JSFiddle - React, Tailwind, and code Playground

HTML

<form id="myForm">
<input type="radio" name="radioName" value="1" /> 1 <br />
<input type="radio" name="radioName" value="2" /> 2 <br />
<input type="radio" name="radioName" value="3" /> 3 <br />
</form>
<br>
<form id="myForm2">
<input type="radio" name="radioName" value="1" /> 1 <br />
<input type="radio" name="radioName" value="2" /> 2 <br />
<input type="radio" name="radioName" value="3" /> 3 <br />
</form>

<button id="click">click to calculate</button>

JavaScript

$('#click').on('click', function() {
   var a =  parseInt($('input[name=radioName]:checked', '#myForm').val());
   var b =  parseInt($('input[name=radioName]:checked', '#myForm2').val());
   var sum = a+b;
    alert (sum);
});