OK, let's work through this together. We're starting with 124 and we're going to multiply it by 4, which means we add 124 to itself 4 times.
Step 1: 0 + 124 = 124
Step 2: 124 + 124 = 248
Step 3: 248 + 124 = 372
Step 4: 372 + 124 = 496

So, 124*4 = 496