OK, let's crack this. We're given 112 and our task is to multiply it by 12. Essentially, we'll be adding 112 to itself 12 times.
Step 1: 0 + 112 = 112
Step 2: 112 + 112 = 224
Step 3: 224 + 112 = 336
Step 4: 336 + 112 = 448
Step 5: 448 + 112 = 560
Step 6: 560 + 112 = 672
Step 7: 672 + 112 = 784
Step 8: 784 + 112 = 896
Step 9: 896 + 112 = 1008
Step 10: 1008 + 112 = 1120
Step 11: 1120 + 112 = 1232
Step 12: 1232 + 112 = 1344

So, 112*12 = 1344