Let's get this math done. We have 939 and we're going to multiply it by 7. This is the same as taking 939 and adding it to itself 7 times.
Step 1: 0 + 939 = 939
Step 2: 939 + 939 = 1878
Step 3: 1878 + 939 = 2817
Step 4: 2817 + 939 = 3756
Step 5: 3756 + 939 = 4695
Step 6: 4695 + 939 = 5634
Step 7: 5634 + 939 = 6573

So, 939*7 = 6573