Let's roll up our sleeves and solve this. We have 355 and we're going to multiply it by 5, essentially adding 355 to itself 5 times.
Step 1: 0 + 355 = 355
Step 2: 355 + 355 = 710
Step 3: 710 + 355 = 1065
Step 4: 1065 + 355 = 1420
Step 5: 1420 + 355 = 1775

So, 355*5 = 1775