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3. multiplication-an arithmetic operation that is the inverse of division; the product of two numbers is computed; the multiplication of four by three gives twelve; four times three equals twelve. times. arithmetic operation-a mathematical operation involving numbers.
1. (Mathematics) the branch of mathematics concerned with numerical calculations, such as addition, subtraction, multiplication, and division. 2. (Mathematics) one or more calculations involving numerical operations. 3. (Mathematics) knowledge of or skill in using arithmetic: his arithmetic is good. adj.