OK, let's work through this together. We're starting with 501 and we're going to multiply it by 5, which means we add 501 to itself 5 times.
Step 1: 0 + 501 = 501
Step 2: 501 + 501 = 1002
Step 3: 1002 + 501 = 1503
Step 4: 1503 + 501 = 2004
Step 5: 2004 + 501 = 2505

So, 501*5 = 2505