Without delay, let's solve this. We've got 965 and we will be multiplying it by 21, that is, adding 965 to itself 21 times.
Step 1: 0 + 965 = 965
Step 2: 965 + 965 = 1930
Step 3: 1930 + 965 = 2895
Step 4: 2895 + 965 = 3860
Step 5: 3860 + 965 = 4825
Step 6: 4825 + 965 = 5790
Step 7: 5790 + 965 = 6755
Step 8: 6755 + 965 = 7720
Step 9: 7720 + 965 = 8685
Step 10: 8685 + 965 = 9650
Step 11: 9650 + 965 = 10615
Step 12: 10615 + 965 = 11580
Step 13: 11580 + 965 = 12545
Step 14: 12545 + 965 = 13510
Step 15: 13510 + 965 = 14475
Step 16: 14475 + 965 = 15440
Step 17: 15440 + 965 = 16405
Step 18: 16405 + 965 = 17370
Step 19: 17370 + 965 = 18335
Step 20: 18335 + 965 = 19300
Step 21: 19300 + 965 = 20265

So, 965*21 = 20265