OK, let's work through this together. We're starting with 602 and we're going to multiply it by 12, which means we add 602 to itself 12 times.
Step 1: 0 + 602 = 602
Step 2: 602 + 602 = 1204
Step 3: 1204 + 602 = 1806
Step 4: 1806 + 602 = 2408
Step 5: 2408 + 602 = 3010
Step 6: 3010 + 602 = 3612
Step 7: 3612 + 602 = 4214
Step 8: 4214 + 602 = 4816
Step 9: 4816 + 602 = 5418
Step 10: 5418 + 602 = 6020
Step 11: 6020 + 602 = 6622
Step 12: 6622 + 602 = 7224

So, 602*12 = 7224