Let's get this math done. We have 626 and we're going to multiply it by 13. This is the same as taking 626 and adding it to itself 13 times.
Step 1: 0 + 626 = 626
Step 2: 626 + 626 = 1252
Step 3: 1252 + 626 = 1878
Step 4: 1878 + 626 = 2504
Step 5: 2504 + 626 = 3130
Step 6: 3130 + 626 = 3756
Step 7: 3756 + 626 = 4382
Step 8: 4382 + 626 = 5008
Step 9: 5008 + 626 = 5634
Step 10: 5634 + 626 = 6260
Step 11: 6260 + 626 = 6886
Step 12: 6886 + 626 = 7512
Step 13: 7512 + 626 = 8138

So, 626*13 = 8138