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Long multiplication is a written method for multiplying large numbers by breaking the problem into single-digit multiplications, then summing the partial products with correct place-value offsets.
단계별 가이드
- 1Write the numbers with the larger on top
- 2Multiply the top number by the ones digit of the bottom number
- 3Multiply the top number by the tens digit, shifting left by one place
- 4Continue for each digit of the bottom number
- 5Sum all partial products
풀어진 예시
입력
47 × 36
결과
1,692
47×6=282, 47×30=1410, sum=1692
입력
123 × 45
결과
5,535
123×5=615, 123×40=4920
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