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Multiplication
Question: 23 x 21
Step 1: Multiply vertically in the left hand column 2 X 2 = 4
Step 2: Then multiply crosswise and add up the sum of the two multiplications
(2 x 3 ) + (2 x 1) = 6 + 2 = 8
Step 3: Lastly, multiply vertically in the right-hand column: 1 x 3 = 3
Therefore, the answer is 483
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