Let's get this math done. We have 751 and we're going to multiply it by 5. This is the same as taking 751 and adding it to itself 5 times.
Step 1: 0 + 751 = 751
Step 2: 751 + 751 = 1502
Step 3: 1502 + 751 = 2253
Step 4: 2253 + 751 = 3004
Step 5: 3004 + 751 = 3755

So, 751*5 = 3755