21×11

21×11 is a mathematical expression that represents the multiplication of the numbers 21 and 11. The result of this multiplication is 231. This operation is a fundamental concept in arithmetic and is often used in various mathematical contexts, such as in the multiplication of larger numbers using the lattice method or the Russian peasant multiplication algorithm. The expression 21×11 can also be represented as 21 multiplied by 11, or 21 times 11. In algebraic terms, it can be written as 21 * 11 = 231. This simple multiplication is a basic example of how numbers can be combined through multiplication to produce a new number.