Let's roll up our sleeves and solve this. We have 111 and we're going to multiply it by 12, essentially adding 111 to itself 12 times.
Step 1: 0 + 111 = 111
Step 2: 111 + 111 = 222
Step 3: 222 + 111 = 333
Step 4: 333 + 111 = 444
Step 5: 444 + 111 = 555
Step 6: 555 + 111 = 666
Step 7: 666 + 111 = 777
Step 8: 777 + 111 = 888
Step 9: 888 + 111 = 999
Step 10: 999 + 111 = 1110
Step 11: 1110 + 111 = 1221
Step 12: 1221 + 111 = 1332

So, 111*12 = 1332