OK, let's work through this together. We're starting with 311 and we're going to multiply it by 12, which means we add 311 to itself 12 times.
Step 1: 0 + 311 = 311
Step 2: 311 + 311 = 622
Step 3: 622 + 311 = 933
Step 4: 933 + 311 = 1244
Step 5: 1244 + 311 = 1555
Step 6: 1555 + 311 = 1866
Step 7: 1866 + 311 = 2177
Step 8: 2177 + 311 = 2488
Step 9: 2488 + 311 = 2799
Step 10: 2799 + 311 = 3110
Step 11: 3110 + 311 = 3421
Step 12: 3421 + 311 = 3732

So, 311*12 = 3732