OK, let's crack this. We're given 325 and our task is to multiply it by 12. Essentially, we'll be adding 325 to itself 12 times.
Step 1: 0 + 325 = 325
Step 2: 325 + 325 = 650
Step 3: 650 + 325 = 975
Step 4: 975 + 325 = 1300
Step 5: 1300 + 325 = 1625
Step 6: 1625 + 325 = 1950
Step 7: 1950 + 325 = 2275
Step 8: 2275 + 325 = 2600
Step 9: 2600 + 325 = 2925
Step 10: 2925 + 325 = 3250
Step 11: 3250 + 325 = 3575
Step 12: 3575 + 325 = 3900

So, 325*12 = 3900