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multiplication
小学校の算数の授業でかけ算の九九を覚えた。
I memorized the multiplication table in elementary school.
かけ算は足し算の次に習う計算方法だ。
Multiplication is learned after addition.
大きな数のかけ算は電卓を使うと便利だ。
Using a calculator is convenient for multiplying large numbers.