Sure thing, let's get straight to it. We start with 919 and we're going to multiply it by 15, which means adding 919 to itself 15 times.
Step 1: 0 + 919 = 919
Step 2: 919 + 919 = 1838
Step 3: 1838 + 919 = 2757
Step 4: 2757 + 919 = 3676
Step 5: 3676 + 919 = 4595
Step 6: 4595 + 919 = 5514
Step 7: 5514 + 919 = 6433
Step 8: 6433 + 919 = 7352
Step 9: 7352 + 919 = 8271
Step 10: 8271 + 919 = 9190
Step 11: 9190 + 919 = 10109
Step 12: 10109 + 919 = 11028
Step 13: 11028 + 919 = 11947
Step 14: 11947 + 919 = 12866
Step 15: 12866 + 919 = 13785

So, 919*15 = 13785