OK, let's crack this. We're given 127 and our task is to multiply it by 4. Essentially, we'll be adding 127 to itself 4 times.
Step 1: 0 + 127 = 127
Step 2: 127 + 127 = 254
Step 3: 254 + 127 = 381
Step 4: 381 + 127 = 508

So, 127*4 = 508