Let's get this math done. We have 402 and we're going to multiply it by 4. This is the same as taking 402 and adding it to itself 4 times.
Step 1: 0 + 402 = 402
Step 2: 402 + 402 = 804
Step 3: 804 + 402 = 1206
Step 4: 1206 + 402 = 1608

So, 402*4 = 1608