Let's roll up our sleeves and solve this. We have 257 and we're going to multiply it by 5, essentially adding 257 to itself 5 times.
Step 1: 0 + 257 = 257
Step 2: 257 + 257 = 514
Step 3: 514 + 257 = 771
Step 4: 771 + 257 = 1028
Step 5: 1028 + 257 = 1285

So, 257*5 = 1285