OK, let's crack this. We're given 963 and our task is to multiply it by 15. Essentially, we'll be adding 963 to itself 15 times.
Step 1: 0 + 963 = 963
Step 2: 963 + 963 = 1926
Step 3: 1926 + 963 = 2889
Step 4: 2889 + 963 = 3852
Step 5: 3852 + 963 = 4815
Step 6: 4815 + 963 = 5778
Step 7: 5778 + 963 = 6741
Step 8: 6741 + 963 = 7704
Step 9: 7704 + 963 = 8667
Step 10: 8667 + 963 = 9630
Step 11: 9630 + 963 = 10593
Step 12: 10593 + 963 = 11556
Step 13: 11556 + 963 = 12519
Step 14: 12519 + 963 = 13482
Step 15: 13482 + 963 = 14445

So, 963*15 = 14445