JSFiddle - React, Tailwind, and code Playground

HTML

<body>

<table>
<tr>
<td class="first">100</td>
<td class="second">20</td>
</tr>
</table>
    <script>
    document.body.onload = function(){
    	 var firstTdVal = document.getElementsByClassName('first')[0].innerHTML;
       var secondTdVal = document.getElementsByClassName('second')[0].innerHTML;
       var valueToBeShown = parseInt(firstTdVal)/parseInt(secondTdVal);
       document.getElementsByClassName('second')[0].innerHTML = valueToBeShown ;
    }
    </script>
</body>