OK, let's work through this together. We're starting with 697 and we're going to multiply it by 15, which means we add 697 to itself 15 times.
Step 1: 0 + 697 = 697
Step 2: 697 + 697 = 1394
Step 3: 1394 + 697 = 2091
Step 4: 2091 + 697 = 2788
Step 5: 2788 + 697 = 3485
Step 6: 3485 + 697 = 4182
Step 7: 4182 + 697 = 4879
Step 8: 4879 + 697 = 5576
Step 9: 5576 + 697 = 6273
Step 10: 6273 + 697 = 6970
Step 11: 6970 + 697 = 7667
Step 12: 7667 + 697 = 8364
Step 13: 8364 + 697 = 9061
Step 14: 9061 + 697 = 9758
Step 15: 9758 + 697 = 10455

So, 697*15 = 10455