JSFiddle - React, Tailwind, and code Playground

HTML

<form oninput="result.value=(-1.0797 * parseInt(a.value) * parseInt(a.value)) + (52.466 * parseInt(a.value) - 820.183)">
    <input id="aa" type="number" name="a" onchange="setTwoNumberDecimal" min="19" max="55" step="0.25" value="22.00" /> <br>
    <output id="polar" name="result">-</output>
  </form>

JavaScript

function setTwoNumberDecimal(){
var format = d3.format(".3n");
var fname = d3.format(".3n")(document.getElementById('aa').value);
document.getElementById('result').innerHTML = fname;
}