Step 1: Set up the long multiplication.
1 2
1 2
_____
Step 2: Calculate 2 x 2, which is 4.
1 2
1 2
_____
4
Step 3: Calculate 1 x 2, which is 2.
1 2
1 2
_____
2 4
Step 4: Calculate 2 x 1, which is 2.
1 2
1 2
_____
2 4
2 0
______
Step 5: Calculate 1 x 1, which is 1.
1 2
1 2
_____
2 4
1 2 0
______
Step 6: Calculate 24 + 120, which is 144
1 2
1 2
_____
2 4
1 2 0
_____
1 4 4
Step 7: Therefore, 12 x 12 = 144.
144 is your answer
