OK, let's work through this together. We're starting with 634 and we're going to multiply it by 5, which means we add 634 to itself 5 times.
Step 1: 0 + 634 = 634
Step 2: 634 + 634 = 1268
Step 3: 1268 + 634 = 1902
Step 4: 1902 + 634 = 2536
Step 5: 2536 + 634 = 3170

So, 634*5 = 3170