Let's get this math done. We have 77 and we're going to multiply it by 4. This is the same as taking 77 and adding it to itself 4 times.
Step 1: 0 + 77 = 77
Step 2: 77 + 77 = 154
Step 3: 154 + 77 = 231
Step 4: 231 + 77 = 308

So, 77*4 = 308