how to use arithmetic in html code example

Example 1: js calculate

answer_Add = 5 + 1; //answer = 6
answer_Sub = 5 - 1; //answer = 4
answer_Multi = 5 * 5; //answer = 25
answer_Divi = 10 / 2; //answer = 5
Total = answer_Add + answer_Sub + answer_Multi + answer_Divi;

Example 2: modulus js

console.log(10%3);
//returns 1 (the remainder of 10/3)