<html>
<head>
<title>Math Operations</title>
<style>
body {
background-color: black;
color: white;
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
text-align: center;
}
input[type="text"] {
padding: 10px;
border: 1px solid white;
border-radius: 5px;
background-color: black;
color: white;
}
input[type="submit"] {
padding: 10px 20px;
border: none;
background-color: white;
color: black;
border-radius: 5px;
font-size: 16px;
cursor: pointer;
}

input[type="submit"]:hover {
background-color: gray;
}
h3 {
m