Without delay, let's solve this. We've got 627 and we will be multiplying it by 15, that is, adding 627 to itself 15 times.
Step 1: 0 + 627 = 627
Step 2: 627 + 627 = 1254
Step 3: 1254 + 627 = 1881
Step 4: 1881 + 627 = 2508
Step 5: 2508 + 627 = 3135
Step 6: 3135 + 627 = 3762
Step 7: 3762 + 627 = 4389
Step 8: 4389 + 627 = 5016
Step 9: 5016 + 627 = 5643
Step 10: 5643 + 627 = 6270
Step 11: 6270 + 627 = 6897
Step 12: 6897 + 627 = 7524
Step 13: 7524 + 627 = 8151
Step 14: 8151 + 627 = 8778
Step 15: 8778 + 627 = 9405

So, 627*15 = 9405