如何使html表单输出显示十进制数？

<input type="number" name="decimalNumber">

decimal_number = int(request.form['decimalNumber'])
output = "输入的十进制数为：" + str(decimal_number)

<input type="number" name="decimalNumber" id="decimalNumberInput" oninput="showDecimal()">
<div id="decimalOutput"></div>

<script>
function showDecimal() {
    var input = document.getElementById("decimalNumberInput").value;
    var output = document.getElementById("decimalOutput");
    output.innerHTML = "输入的十进制数为：" + input;
}
</script>