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<!DOCTYPE html>
<html>
<title>Fahrenheit to Celcius Temperature Converter</title>
<body>
<h2>Temperature Converter</h2>
<p>Type a value in the Fahrenheit field to convert the value to Celsius:</p>
<p>
  <label>Fahrenheit</label>
  <input id="inputFahrenheit" type="number" placeholder="Fahrenheit" oninput="temperatureConverter(this.value)" onchange="temperatureConverter(this.value)">
</p>
<p>Celcius: <span id="outputCelcius"></span></p>
<script>
function temperatureConverter(valNum) {
  valNum = parseFloat(valNum);
  document.getElementById("outputCelcius").innerHTML=(valNum-32)/1.8;
}
</script>
</body>
</html>