Let's roll up our sleeves and solve this. We have 157 and we're going to multiply it by 5, essentially adding 157 to itself 5 times.
Step 1: 0 + 157 = 157
Step 2: 157 + 157 = 314
Step 3: 314 + 157 = 471
Step 4: 471 + 157 = 628
Step 5: 628 + 157 = 785

So, 157*5 = 785