diff --git a/calculator.js b/calculator.js
new file mode 100644
index 0000000..194ddaf
--- /dev/null
+++ b/calculator.js
@@ -0,0 +1,134 @@
+<!DOCTYPE html>
+<html>
+  
+<head>
+    <script src=
+"https://cdnjs.cloudflare.com/ajax/libs/mathjs/10.6.4/math.js"
+        integrity=
+"sha512-BbVEDjbqdN3Eow8+empLMrJlxXRj5nEitiCAK5A1pUr66+jLVejo3PmjIaucRnjlB0P9R3rBUs3g5jXc8ti+fQ=="
+        crossorigin="anonymous" 
+        referrerpolicy="no-referrer"></script>
+    <script src=
+"https://cdnjs.cloudflare.com/ajax/libs/mathjs/10.6.4/math.min.js"
+        integrity=
+"sha512-iphNRh6dPbeuPGIrQbCdbBF/qcqadKWLa35YPVfMZMHBSI6PLJh1om2xCTWhpVpmUyb4IvVS9iYnnYMkleVXLA=="
+        crossorigin="anonymous" 
+        referrerpolicy="no-referrer"></script>
+  
+    <style>
+        table {
+            border: 2px solid black;
+            margin-left: auto;
+            margin-right: auto;
+        }
+  
+        input[type="button"] {
+            width: 100%;
+            padding: 30px 40px;
+            background-color: green;
+            color: white;
+            font-size: 24px;
+            font-weight: bold;
+            border: none;
+            border-radius: 5px;
+        }
+  
+        input[type="text"] {
+            padding: 30px 30px;
+            font-size: 24px;
+            font-weight: bold;
+            border: none;
+            border-radius: 5px;
+            border: 2px solid black;
+        }
+    </style>
+</head>
+
+  
+<body>
+    <table id="calculator">
+        <tr>
+            <td colspan="3"><input type="text" id="result"></td>
+            <td><input type="button" value="c" onclick="clr()" /> </td>
+        </tr>
+        <tr>
+            <td><input type="button" value="1" onclick="dis('1')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="2" onclick="dis('2')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="3" onclick="dis('3')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="/" onclick="dis('/')" 
+                        onkeydown="myFunction(event)"> </td>
+        </tr>
+        <tr>
+            <td><input type="button" value="4" onclick="dis('4')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="5" onclick="dis('5')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="6" onclick="dis('6')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="*" onclick="dis('*')" 
+                        onkeydown="myFunction(event)"> </td>
+        </tr>
+        <tr>
+            <td><input type="button" value="7" onclick="dis('7')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="8" onclick="dis('8')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="9" onclick="dis('9')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="-" onclick="dis('-')"
+                        onkeydown="myFunction(event)"> </td>
+        </tr>
+        <tr>
+            <td><input type="button" value="0" onclick="dis('0')" 
+                        onkeydown="myFunction(event)"> </td>
+            <td><input type="button" value="." onclick="dis('.')" 
+                        onkeydown="myFunction(event)"> </td>
+            <!-- solve function call function solve to evaluate value -->
+            <td><input type="button" value="=" onclick="solve()"> </td>
+  
+            <td><input type="button" value="+" onclick="dis('+')" 
+                        onkeydown="myFunction(event)"> </td>
+        </tr>
+    </table>
+  
+    <script>
+        // Function that display value
+        function dis(val) {
+            document.getElementById("result").value += val
+        }
+  
+        function myFunction(event) {
+            if (event.key == '0' || event.key == '1' 
+                || event.key == '2' || event.key == '3'
+                || event.key == '4' || event.key == '5' 
+                || event.key == '6' || event.key == '7'
+                || event.key == '8' || event.key == '9' 
+                || event.key == '+' || event.key == '-'
+                || event.key == '*' || event.key == '/')
+                document.getElementById("result").value += event.key;
+        }
+  
+        var cal = document.getElementById("calcu");
+        cal.onkeyup = function (event) {
+            if (event.keyCode === 13) {
+                console.log("Enter");
+                let x = document.getElementById("result").value
+                console.log(x);
+                solve();
+            }
+        }
+        function solve() {
+            let x = document.getElementById("result").value
+            let y = math.evaluate(x)
+            document.getElementById("result").value = y
+        }
+        function clr() {
+            document.getElementById("result").value = ""
+        }
+    </script>
+</body>
+  
+</html>   
