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to multiply
to crossbreed; to cross-breed; to cross; to cross-fertilize; to hybridize
to mix (e.g. paint colours)
三と五を掛け合わせると十五になる。
Multiplying three by five gives fifteen
異なる品種を掛け合わせて作る。
Created by crossbreeding different varieties
二つの数を掛け合わせたら、予想より大きな値になった。
When I multiplied the two numbers, the result was larger than expected.