<!DOCTYPE html>
<html>
<head>
<title>Currency Converter</title>
</head>
<body>

<h2>Currency Converter</h2>

Amount: <input type="number" id="amt" onkeyup="convert()"><br><br>

From:
<select id="from" onchange="convert()">
  <option value="1">INR</option>
  <option value="0.012">USD</option>
  <option value="0.011">EUR</option>
  <option value="0.010">GBP</option>
</select>

To:
<select id="to" onchange="convert()">
  <option value="1">INR</option>
  <option value="83">USD</option>
  <option value="90">EUR</option>
  <option value="100">GBP</option>
</select>

<h3 id="res"></h3>

<script>
function convert(){
  let a = document.getElementById("amt").value;
  let f = document.getElementById("from").value;
  let t = document.getElementById("to").value;

  let result = (a * t) / f;

  document.getElementById("res").innerHTML = "Converted: " + result.toFixed(2);
}
</script>

</body>
</html>
