JSFiddle - React, Tailwind, and code Playground

HTML

<div id="result"></div>

JavaScript

sumStrings('712569312664357328695151392', '8100824045303269669937');

function sumStrings(a,b) {
  var res = +a + +b,
      res = res.toString(),
      div = document.getElementById('result');
  
 	result.innerHTML = res;
}