Let's get this math done. We have 726 and we're going to multiply it by 17. This is the same as taking 726 and adding it to itself 17 times.
Step 1: 0 + 726 = 726
Step 2: 726 + 726 = 1452
Step 3: 1452 + 726 = 2178
Step 4: 2178 + 726 = 2904
Step 5: 2904 + 726 = 3630
Step 6: 3630 + 726 = 4356
Step 7: 4356 + 726 = 5082
Step 8: 5082 + 726 = 5808
Step 9: 5808 + 726 = 6534
Step 10: 6534 + 726 = 7260
Step 11: 7260 + 726 = 7986
Step 12: 7986 + 726 = 8712
Step 13: 8712 + 726 = 9438
Step 14: 9438 + 726 = 10164
Step 15: 10164 + 726 = 10890
Step 16: 10890 + 726 = 11616
Step 17: 11616 + 726 = 12342

So, 726*17 = 12342