OK, let's work through this together. We're starting with 11 and we're going to multiply it by 5, which means we add 11 to itself 5 times.
Step 1: 0 + 11 = 11
Step 2: 11 + 11 = 22
Step 3: 22 + 11 = 33
Step 4: 33 + 11 = 44
Step 5: 44 + 11 = 55

So, 11*5 = 55