Let's get this math done. We have 452 and we're going to multiply it by 4. This is the same as taking 452 and adding it to itself 4 times.
Step 1: 0 + 452 = 452
Step 2: 452 + 452 = 904
Step 3: 904 + 452 = 1356
Step 4: 1356 + 452 = 1808

So, 452*4 = 1808