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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 Exponentiation is a mathematical operation that represents repeated multiplication. The exponent, $n$, in the expression $b^n$, represents the number of times the base, $b$, is multiplied by itself. For example, the expression $b^3$ means $b \cdot b \cdot b$.  Any number raised by the exponent $1$ is the number itself.