OK, let's crack this. We're given 649 and our task is to multiply it by 12. Essentially, we'll be adding 649 to itself 12 times.
Step 1: 0 + 649 = 649
Step 2: 649 + 649 = 1298
Step 3: 1298 + 649 = 1947
Step 4: 1947 + 649 = 2596
Step 5: 2596 + 649 = 3245
Step 6: 3245 + 649 = 3894
Step 7: 3894 + 649 = 4543
Step 8: 4543 + 649 = 5192
Step 9: 5192 + 649 = 5841
Step 10: 5841 + 649 = 6490
Step 11: 6490 + 649 = 7139
Step 12: 7139 + 649 = 7788

So, 649*12 = 7788