Sure thing! We've got 102 and we're gonna multiply it by 5. That's the same as adding 102 to itself 5 times.
Step 1: 0 + 102 = 102
Step 2: 102 + 102 = 204
Step 3: 204 + 102 = 306
Step 4: 306 + 102 = 408
Step 5: 408 + 102 = 510

So, 102*5 = 510