OK, let's work through this together. We're starting with 101 and we're going to multiply it by 4, which means we add 101 to itself 4 times.
Step 1: 0 + 101 = 101
Step 2: 101 + 101 = 202
Step 3: 202 + 101 = 303
Step 4: 303 + 101 = 404

So, 101*4 = 404