Let's get this math done. We have 171 and we're going to multiply it by 12. This is the same as taking 171 and adding it to itself 12 times.
Step 1: 0 + 171 = 171
Step 2: 171 + 171 = 342
Step 3: 342 + 171 = 513
Step 4: 513 + 171 = 684
Step 5: 684 + 171 = 855
Step 6: 855 + 171 = 1026
Step 7: 1026 + 171 = 1197
Step 8: 1197 + 171 = 1368
Step 9: 1368 + 171 = 1539
Step 10: 1539 + 171 = 1710
Step 11: 1710 + 171 = 1881
Step 12: 1881 + 171 = 2052

So, 171*12 = 2052