JSFiddle - React, Tailwind, and code Playground

HTML

<script>
var k=new Array(1,2,3,4,5,6,7,8,9,10,11,12);
</script>
<form onsubmit="return false" oninput="o.value =parseInt(a.value) * parseInt(b.value) * k[parseInt(b.value) -1 ]">
	<input type="range"  name="a" id="a" min="100" max="10000" step="100" onchange="document.getElementById('rangeValue').innerHTML = this.value;">
	<span id="rangeValue">100</span>
	<input type="range" name="b" id="b" min="1" max="12" step="1" onchange="document.getElementById('rangeValue2').innerHTML = this.value;">
	<span id="rangeValue2">3</span>
  <br>
	<output name="o" for="a b">0</output>
</form>