Let's get this math done. We have 649 and we're going to multiply it by 7. This is the same as taking 649 and adding it to itself 7 times.
Step 1: 0 + 649 = 649
Step 2: 649 + 649 = 1298
Step 3: 1298 + 649 = 1947
Step 4: 1947 + 649 = 2596
Step 5: 2596 + 649 = 3245
Step 6: 3245 + 649 = 3894
Step 7: 3894 + 649 = 4543

So, 649*7 = 4543