OK, let's work through this together. We're starting with 696 and we're going to multiply it by 21, which means we add 696 to itself 21 times.
Step 1: 0 + 696 = 696
Step 2: 696 + 696 = 1392
Step 3: 1392 + 696 = 2088
Step 4: 2088 + 696 = 2784
Step 5: 2784 + 696 = 3480
Step 6: 3480 + 696 = 4176
Step 7: 4176 + 696 = 4872
Step 8: 4872 + 696 = 5568
Step 9: 5568 + 696 = 6264
Step 10: 6264 + 696 = 6960
Step 11: 6960 + 696 = 7656
Step 12: 7656 + 696 = 8352
Step 13: 8352 + 696 = 9048
Step 14: 9048 + 696 = 9744
Step 15: 9744 + 696 = 10440
Step 16: 10440 + 696 = 11136
Step 17: 11136 + 696 = 11832
Step 18: 11832 + 696 = 12528
Step 19: 12528 + 696 = 13224
Step 20: 13224 + 696 = 13920
Step 21: 13920 + 696 = 14616

So, 696*21 = 14616