diff --git a/.dart_tool/package_config.json b/.dart_tool/package_config.json
new file mode 100644
index 0000000..dfc0777
--- /dev/null
+++ b/.dart_tool/package_config.json
@@ -0,0 +1,175 @@
+{
+  "configVersion": 2,
+  "packages": [
+    {
+      "name": "archive",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/archive-2.0.13",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "args",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/args-1.6.0",
+      "packageUri": "lib/",
+      "languageVersion": "2.3"
+    },
+    {
+      "name": "async",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/async-2.4.1",
+      "packageUri": "lib/",
+      "languageVersion": "2.2"
+    },
+    {
+      "name": "boolean_selector",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/boolean_selector-2.0.0",
+      "packageUri": "lib/",
+      "languageVersion": "2.4"
+    },
+    {
+      "name": "charcode",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/charcode-1.1.3",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "collection",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/collection-1.14.12",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "convert",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/convert-2.1.1",
+      "packageUri": "lib/",
+      "languageVersion": "1.17"
+    },
+    {
+      "name": "crypto",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/crypto-2.1.4",
+      "packageUri": "lib/",
+      "languageVersion": "2.1"
+    },
+    {
+      "name": "cupertino_icons",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/cupertino_icons-0.1.3",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "flutter",
+      "rootUri": "file:///C:/src/flutter/flutter/packages/flutter",
+      "packageUri": "lib/",
+      "languageVersion": "2.2"
+    },
+    {
+      "name": "flutter_test",
+      "rootUri": "file:///C:/src/flutter/flutter/packages/flutter_test",
+      "packageUri": "lib/",
+      "languageVersion": "2.2"
+    },
+    {
+      "name": "image",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/image-2.1.12",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "matcher",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/matcher-0.12.6",
+      "packageUri": "lib/",
+      "languageVersion": "2.2"
+    },
+    {
+      "name": "meta",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/meta-1.1.8",
+      "packageUri": "lib/",
+      "languageVersion": "1.12"
+    },
+    {
+      "name": "path",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/path-1.6.4",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "petitparser",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/petitparser-2.4.0",
+      "packageUri": "lib/",
+      "languageVersion": "2.4"
+    },
+    {
+      "name": "quiver",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/quiver-2.1.3",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "sky_engine",
+      "rootUri": "file:///C:/src/flutter/flutter/bin/cache/pkg/sky_engine",
+      "packageUri": "lib/",
+      "languageVersion": "1.11"
+    },
+    {
+      "name": "source_span",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/source_span-1.7.0",
+      "packageUri": "lib/",
+      "languageVersion": "2.6"
+    },
+    {
+      "name": "stack_trace",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/stack_trace-1.9.3",
+      "packageUri": "lib/",
+      "languageVersion": "1.23"
+    },
+    {
+      "name": "stream_channel",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/stream_channel-2.0.0",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "string_scanner",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/string_scanner-1.0.5",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "term_glyph",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/term_glyph-1.1.0",
+      "packageUri": "lib/",
+      "languageVersion": "1.8"
+    },
+    {
+      "name": "test_api",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/test_api-0.2.15",
+      "packageUri": "lib/",
+      "languageVersion": "2.4"
+    },
+    {
+      "name": "typed_data",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/typed_data-1.1.6",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "vector_math",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/vector_math-2.0.8",
+      "packageUri": "lib/",
+      "languageVersion": "2.0"
+    },
+    {
+      "name": "xml",
+      "rootUri": "file:///C:/src/flutter/flutter/.pub-cache/hosted/pub.dartlang.org/xml-3.6.1",
+      "packageUri": "lib/",
+      "languageVersion": "2.6"
+    },
+    {
+      "name": "calculatorapp",
+      "rootUri": "../",
+      "packageUri": "lib/"
+    }
+  ],
+  "generated": "2020-10-21T15:16:35.105695Z",
+  "generator": "pub",
+  "generatorVersion": "2.8.3"
+}
diff --git a/ios/Flutter/flutter_export_environment.sh b/ios/Flutter/flutter_export_environment.sh
new file mode 100644
index 0000000..9a3dee7
--- /dev/null
+++ b/ios/Flutter/flutter_export_environment.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=C:\src\flutter\flutter"
+export "FLUTTER_APPLICATION_PATH=D:\open source projects\fluttercalculator"
+export "FLUTTER_TARGET=lib\main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build\ios"
+export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
+export "FLUTTER_FRAMEWORK_DIR=C:\src\flutter\flutter\bin\cache\artifacts\engine\ios"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
diff --git a/lib/home_page.dart b/lib/home_page.dart
index 6055161..a2d106b 100644
--- a/lib/home_page.dart
+++ b/lib/home_page.dart
@@ -56,78 +56,80 @@ class HomePageState extends State<HomePage> {
       appBar: new AppBar(
         title: new Text("Calculator"),
       ),
-      body: new Container(
-        padding: const EdgeInsets.all(40.0),
-        child: new Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            new Text(
-              "Output : $sum",
-              style: new TextStyle(
-                  fontSize: 20.0,
-                  fontWeight: FontWeight.bold,
-                  color: Colors.purple),
-            ),
-            new TextField(
-              keyboardType: TextInputType.number,
-              decoration: new InputDecoration(hintText: "Enter Number 1"),
-              controller: t1,
-            ),
-            new TextField(
-              keyboardType: TextInputType.number,
-              decoration: new InputDecoration(hintText: "Enter Number 2"),
-              controller: t2,
-            ),
-            new Padding(
-              padding: const EdgeInsets.only(top: 20.0),
-            ),
-            new Row(
-              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-              children: <Widget>[
-                new MaterialButton(
-                  child: new Text("+"),
-                  color: Colors.greenAccent,
-                  onPressed: doAddition,
-                ),
-                new MaterialButton(
-                  child: new Text("-"),
-                  color: Colors.greenAccent,
-                  onPressed: doSub,
-                ),
-              ],
-            ),
-            new Padding(
-              padding: const EdgeInsets.only(top: 20.0),
-            ),
-            new Row(
-              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-              children: <Widget>[
-                new MaterialButton(
-                  child: new Text("*"),
-                  color: Colors.greenAccent,
-                  onPressed: doMul,
-                ),
-                new MaterialButton(
-                  child: new Text("/"),
-                  color: Colors.greenAccent,
-                  onPressed: doDiv,
-                ),
-              ],
-            ),
-            new Padding(
-              padding: const EdgeInsets.only(top: 20.0),
-            ),
-            new Row(
-              mainAxisAlignment: MainAxisAlignment.center,
-              children: <Widget>[
-                new MaterialButton(
-                  child: new Text("Clear"),
-                  color: Colors.greenAccent,
-                  onPressed: doClear,
-                ),
-              ],
-            )
-          ],
+      body: SingleChildScrollView(
+              child: new Container(
+          padding: const EdgeInsets.all(40.0),
+          child: new Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: <Widget>[
+              new Text(
+                "Output : $sum",
+                style: new TextStyle(
+                    fontSize: 20.0,
+                    fontWeight: FontWeight.bold,
+                    color: Colors.purple),
+              ),
+              new TextField(
+                keyboardType: TextInputType.number,
+                decoration: new InputDecoration(hintText: "Enter Number 1"),
+                controller: t1,
+              ),
+              new TextField(
+                keyboardType: TextInputType.number,
+                decoration: new InputDecoration(hintText: "Enter Number 2"),
+                controller: t2,
+              ),
+              new Padding(
+                padding: const EdgeInsets.only(top: 20.0),
+              ),
+              new Row(
+                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                children: <Widget>[
+                  new MaterialButton(
+                    child: new Text("+"),
+                    color: Colors.greenAccent,
+                    onPressed: doAddition,
+                  ),
+                  new MaterialButton(
+                    child: new Text("-"),
+                    color: Colors.greenAccent,
+                    onPressed: doSub,
+                  ),
+                ],
+              ),
+              new Padding(
+                padding: const EdgeInsets.only(top: 20.0),
+              ),
+              new Row(
+                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                children: <Widget>[
+                  new MaterialButton(
+                    child: new Text("*"),
+                    color: Colors.greenAccent,
+                    onPressed: doMul,
+                  ),
+                  new MaterialButton(
+                    child: new Text("/"),
+                    color: Colors.greenAccent,
+                    onPressed: doDiv,
+                  ),
+                ],
+              ),
+              new Padding(
+                padding: const EdgeInsets.only(top: 20.0),
+              ),
+              new Row(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: <Widget>[
+                  new MaterialButton(
+                    child: new Text("Clear"),
+                    color: Colors.greenAccent,
+                    onPressed: doClear,
+                  ),
+                ],
+              )
+            ],
+          ),
         ),
       ),
     );