OK, let's crack this. We're given 702 and our task is to multiply it by 19. Essentially, we'll be adding 702 to itself 19 times.
Step 1: 0 + 702 = 702
Step 2: 702 + 702 = 1404
Step 3: 1404 + 702 = 2106
Step 4: 2106 + 702 = 2808
Step 5: 2808 + 702 = 3510
Step 6: 3510 + 702 = 4212
Step 7: 4212 + 702 = 4914
Step 8: 4914 + 702 = 5616
Step 9: 5616 + 702 = 6318
Step 10: 6318 + 702 = 7020
Step 11: 7020 + 702 = 7722
Step 12: 7722 + 702 = 8424
Step 13: 8424 + 702 = 9126
Step 14: 9126 + 702 = 9828
Step 15: 9828 + 702 = 10530
Step 16: 10530 + 702 = 11232
Step 17: 11232 + 702 = 11934
Step 18: 11934 + 702 = 12636
Step 19: 12636 + 702 = 13338

So, 702*19 = 13338