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'''Multiplication''' (often denoted by the cross symbol "×", by a point "·", by juxtaposition, or, on computers, by an asterisk "∗") is one of the four elementary, [[Operation (mathematics)|mathematical operations]] of [[arithmetic]]; with the others being [[addition]], [[subtraction]], and [[division]].

== Description ==

The multiplication of whole numbers may be thought as a repeated addition; that is, the multiplication of two numbers is equivalent to adding as many copies of one of them, the multiplicand, as the value of the other one, the multiplier.

Normally, the multiplier is written first and multiplicand second, though this can vary, as the distinction is not very meaningful.

== See also ==

* [[Dimensional analysis]]
* [[Multiplication algorithm]]
** [[Karatsuba algorithm]], for large numbers
* [[Toom–Cook multiplication]], for very large numbers
* [[Schönhage–Strassen algorithm]], for huge numbers
* [[Multiplication table]]
* [[Multiplication ALU]], how computers multiply
** [[Booth's multiplication algorithm]]
** [[Floating point]]
** [[Fused multiply–add]]
** [[Multiply–accumulate]]
** [[Wallace tree]]
* [[Multiplicative inverse]], reciprocal
* [[Factorial]]
* [[Genaille–Lucas rulers]]
* [[Napier's bones]]
* [[Peasant multiplication]]
* [[Product (mathematics)]], for generalizations
* [[Slide rule]]

== External links ==

* [https://en.wikipedia.org/wiki/Multiplication Multiplication] @ Wikipedia


[[Category:Mathematics]]