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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.
Multiplication is also defined for other types of numbers, such as complex numbers, and more abstract constructs, like matrices. For these more abstract constructs, the order that the operands are multiplied sometimes does matter.ne of the main properties of multiplication is the commutative property, adding 3 copies of 4 gives the same result as adding 4 copies of 3: The multiplication of integers (including negative numbers), rational numbers (fractions) and real numbers is defined by a systematic generalization of this basic definition.