29 1? 6 equals 1746. Multiplication is a shortcut to add the same numbers. The result of the operation is called product, and X is the multiplication sign. Four operations refer to four operations: addition, subtraction, multiplication and division. Four operations are the important content of primary school mathematics and the basis of learning other related knowledge. Mathematically, operation is a behavior, and a new quantity is obtained through possible combinations of known quantities. The essence of operation is the mapping between sets. Generally speaking, operation refers to algebraic operation, which is the correspondence in a set. For a pair of elements A and B taken out in sequence in set A, there is a unique third element C corresponding to it in set A, which is called the operation defined in set A..