Let's roll up our sleeves and solve this. We have 613 and we're going to multiply it by 12, essentially adding 613 to itself 12 times.
Step 1: 0 + 613 = 613
Step 2: 613 + 613 = 1226
Step 3: 1226 + 613 = 1839
Step 4: 1839 + 613 = 2452
Step 5: 2452 + 613 = 3065
Step 6: 3065 + 613 = 3678
Step 7: 3678 + 613 = 4291
Step 8: 4291 + 613 = 4904
Step 9: 4904 + 613 = 5517
Step 10: 5517 + 613 = 6130
Step 11: 6130 + 613 = 6743
Step 12: 6743 + 613 = 7356

So, 613*12 = 7356