JSFiddle - React, Tailwind, and code Playground

HTML

Number:<input id="num" type="text" name="number">

<button type="button" onClick="buttonClick()">Submit</button>

<div id='timer'></div>

<script type="text/javascript">
    function buttonClick() {
        var x = document.getElementById('num').value;
        var y = Math.pow(x, 2);
        var z = (y + 4 * x + 10);
        CreateTimer("timer", z);
    }
    
    function CreateTimer(a,b) {
        console.log(a, b)
    }
</script>