OK, let's work through this together. We're starting with 874 and we're going to multiply it by 12, which means we add 874 to itself 12 times.
Step 1: 0 + 874 = 874
Step 2: 874 + 874 = 1748
Step 3: 1748 + 874 = 2622
Step 4: 2622 + 874 = 3496
Step 5: 3496 + 874 = 4370
Step 6: 4370 + 874 = 5244
Step 7: 5244 + 874 = 6118
Step 8: 6118 + 874 = 6992
Step 9: 6992 + 874 = 7866
Step 10: 7866 + 874 = 8740
Step 11: 8740 + 874 = 9614
Step 12: 9614 + 874 = 10488

So, 874*12 = 10488