Learn what multiples are first. Multiplication is a mathematical term, which means that one number A can be divisible by another number B, so A is called a multiple of B ... In other words, if one number is n times that of another number, then this number can be divisible by another number.

A multiple of 6 must be a multiple of 3. This requires us to prove that 6 is divisible by 3. By definition, if a number is a multiple of another number, then this number can be divisible by another number. Therefore, because 6 is twice as much as 3, 6 can be divisible by 3, and the multiple of 6 must also be a multiple of 3.

In mathematics, multiple means that one number is n times that of another number, not that one number is a part of another number. In other words, if a number is a multiple of another number, then this number can be divisible by another number. Although 6 is twice as much as 3, the multiple of 6 does not mean 3 times as much as 6, but a number divisible by 6. We can say that the multiple of 6 must be a multiple of 3, but it cannot be understood that the multiple of 6 must be a multiple of 3.

Multiple applications:

1, basic arithmetic: In basic arithmetic, multiples are an indispensable part. When we need to calculate multiples of a number, we need to use multiples. For example, in order to calculate the average value of a number, we need to calculate the number of times each element is divided by other elements, which is the application of multiples in calculating the average value. Multiplication is also used to solve some basic mathematical problems, such as finding the factor or prime factor of a number.

2. Advanced Mathematics: In advanced mathematics, multiples are widely used. For example, in geometry, multiples can be used to calculate the area or volume of a graph. In algebra, multiples can be used to simplify the solution of equations. Multiplication is also used to solve some advanced mathematical problems, such as finding the sum of all positive factors of a number or finding the number of all positive factors of a number.

3. Practical application: In real life, multiples are also widely used. For example, in the financial field, multiples are used to calculate the return on investment or cost-benefit analysis. In the engineering field, multiples are used to calculate the strength or durability of materials. Multipliers are also used to solve some practical problems, such as calculating the population density of a city or the market share of a company.