Let's get this math done. We have 728 and we're going to multiply it by 6. This is the same as taking 728 and adding it to itself 6 times.
Step 1: 0 + 728 = 728
Step 2: 728 + 728 = 1456
Step 3: 1456 + 728 = 2184
Step 4: 2184 + 728 = 2912
Step 5: 2912 + 728 = 3640
Step 6: 3640 + 728 = 4368

So, 728*6 = 4368