OK, let's work through this together. We're starting with 491 and we're going to multiply it by 5, which means we add 491 to itself 5 times.
Step 1: 0 + 491 = 491
Step 2: 491 + 491 = 982
Step 3: 982 + 491 = 1473
Step 4: 1473 + 491 = 1964
Step 5: 1964 + 491 = 2455

So, 491*5 = 2455