Sure thing, let's get straight to it. We start with 172 and we're going to multiply it by 5, which means adding 172 to itself 5 times.
Step 1: 0 + 172 = 172
Step 2: 172 + 172 = 344
Step 3: 344 + 172 = 516
Step 4: 516 + 172 = 688
Step 5: 688 + 172 = 860

So, 172*5 = 860