JSFiddle - React, Tailwind, and code Playground
by Dmitriy
HTML
<div>
<form>
<input name="a" value="0.3"> - <input name="b" value="0.1"> = <input name="c">
<input type="button" value="Calc" id="calc">
</form>
<div>
JavaScript
$('#calc').on('click', function()
{
var a = $('input[name=a]').val();
var b = $('input[name=b]').val();
var c = a - b;
$('input[name=c]').val(c);
});