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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.
Matrix multiplication. Multiplication of two matrices illustrated with a 4Ã3 and a 3Ã2 matrix with arbitrary symbols. In mathematics, matrix multiplication or the matrix product is a binary operation that produces a matrix from two matrices.