JSFiddle - React, Tailwind, and code Playground
HTML
<input id="num1" value="2" type="text"/>
<input id="num2" value="50" type="text"/>JavaScript
num1 = $("#num1").val(); // exemplo 2
num2 = parseInt($("#num2").val()); // exemplo 50
console.log(typeof num1);
console.log(typeof num2);
alert(parseInt(num1) + num2);