OK, let's crack this. We're given 275 and our task is to multiply it by 12. Essentially, we'll be adding 275 to itself 12 times.
Step 1: 0 + 275 = 275
Step 2: 275 + 275 = 550
Step 3: 550 + 275 = 825
Step 4: 825 + 275 = 1100
Step 5: 1100 + 275 = 1375
Step 6: 1375 + 275 = 1650
Step 7: 1650 + 275 = 1925
Step 8: 1925 + 275 = 2200
Step 9: 2200 + 275 = 2475
Step 10: 2475 + 275 = 2750
Step 11: 2750 + 275 = 3025
Step 12: 3025 + 275 = 3300

So, 275*12 = 3300