Sure thing! We've got 105 and we're gonna multiply it by 5. That's the same as adding 105 to itself 5 times.
Step 1: 0 + 105 = 105
Step 2: 105 + 105 = 210
Step 3: 210 + 105 = 315
Step 4: 315 + 105 = 420
Step 5: 420 + 105 = 525

So, 105*5 = 525