Let's roll up our sleeves and solve this. We have 514 and we're going to multiply it by 15, essentially adding 514 to itself 15 times.
Step 1: 0 + 514 = 514
Step 2: 514 + 514 = 1028
Step 3: 1028 + 514 = 1542
Step 4: 1542 + 514 = 2056
Step 5: 2056 + 514 = 2570
Step 6: 2570 + 514 = 3084
Step 7: 3084 + 514 = 3598
Step 8: 3598 + 514 = 4112
Step 9: 4112 + 514 = 4626
Step 10: 4626 + 514 = 5140
Step 11: 5140 + 514 = 5654
Step 12: 5654 + 514 = 6168
Step 13: 6168 + 514 = 6682
Step 14: 6682 + 514 = 7196
Step 15: 7196 + 514 = 7710

So, 514*15 = 7710