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multiplication. n. 1. (Mathematics) an arithmetical operation, defined initially in terms of repeated addition, usually written a Ã b, a.b, or ab, by which the product of two quantities is calculated: to multiply a by positive integral b is to add a to itself b times.
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.