Let's get this math done. We have 432 and we're going to multiply it by 12. This is the same as taking 432 and adding it to itself 12 times.
Step 1: 0 + 432 = 432
Step 2: 432 + 432 = 864
Step 3: 864 + 432 = 1296
Step 4: 1296 + 432 = 1728
Step 5: 1728 + 432 = 2160
Step 6: 2160 + 432 = 2592
Step 7: 2592 + 432 = 3024
Step 8: 3024 + 432 = 3456
Step 9: 3456 + 432 = 3888
Step 10: 3888 + 432 = 4320
Step 11: 4320 + 432 = 4752
Step 12: 4752 + 432 = 5184

So, 432*12 = 5184