The basic nature of division operation: a number is divisible by several numbers in succession, can be divisible by the product of the following numbers, or can be divisible by the second number first and then by the first number, and the quotient remains unchanged.

Division is one of the four operations. Given the product of two factors and a non-zero factor, the operation of finding another factor is called division.

Division of two numbers is also called the ratio of two numbers. If ab=c(b≠0), the operation of finding another factor A by multiplying the product C and the factor B is division, which is marked as c÷b and pronounced as C divided by B (or B divided by C). Among them, c is called dividend, b is called divisor, and the result of a operation is called quotient.

In mathematics, when the first-level operation (addition and subtraction) and the second-level operation (multiplication and division) are in the same formula at the same time, their operation order is multiplication and division first, then addition and subtraction. If there are parentheses, the order of operations at the same level is from left to right. Such operations are called four operations.