why is this code giving the answer 5

Question

const t = {
val: 2
};
const c1 = () => t.val +=1;
const c2 = () => t.val *=2;
c2();
c1();
console.log(t.val);

Answer 1

Steve Nawa 🇳🇦

c2() = t.val = t.val * 2 = 2 * 2 = 4
c1() = t.val = t.val + 1 = 4 + 1 = 5