Let's get this math done. We have 121 and we're going to multiply it by 4. This is the same as taking 121 and adding it to itself 4 times.
Step 1: 0 + 121 = 121
Step 2: 121 + 121 = 242
Step 3: 242 + 121 = 363
Step 4: 363 + 121 = 484

So, 121*4 = 484