OK, let's crack this. We're given 525 and our task is to multiply it by 4. Essentially, we'll be adding 525 to itself 4 times.
Step 1: 0 + 525 = 525
Step 2: 525 + 525 = 1050
Step 3: 1050 + 525 = 1575
Step 4: 1575 + 525 = 2100

So, 525*4 = 2100