Question

/**
 * @param { number } arg1
 * @param { number } arg2
 */
export function add(arg1, arg2) {
  let r1, r2, m;
  try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
  try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
  m = Math.pow(10, Math.max(r1, r2));
  return (arg1 * m + arg2 * m) / m
}