Let's roll up our sleeves and solve this. We have 89 and we're going to multiply it by 5, essentially adding 89 to itself 5 times.
Step 1: 0 + 89 = 89
Step 2: 89 + 89 = 178
Step 3: 178 + 89 = 267
Step 4: 267 + 89 = 356
Step 5: 356 + 89 = 445

So, 89*5 = 445