<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h5>Select your favorite Color:</h5>
<form action="">
<label for="radius">Radius</label><br>
<input type="text" name="Radius" id="radius"><br>
<label for="volume">Volume</label><br>
<input type="text" name="Volume" id="volume" placeholder="0.00" disabled>
</form>
<hr>
<button onclick="as()">Get Options</button>
<script>
function as()
{
const PI = 3.14159265359;
var x = document.getElementById("radius").value;
parseFloat(x);
var y = (4/3)* PI * (x*x*x);
y = y.toFixed(2);
document.getElementById("volume").value = y;
}
</script>
</body>
</html>
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