For example, 3x4= 12, where 12 is the product.
Product number refers to the accumulated number or quantity or the arithmetic product of two numbers.
Introduction to multiplication:
Multiplication is a shortcut to add up the same numbers. The result of its operation is called product, and "X" is the symbol of multiplication. From the philosophical point of view, multiplication is the result of qualitative change caused by additive quantity. The multiplication of integers (including negative numbers), rational numbers (fractions) and real numbers is a systematic summary of this basic definition.
Multiplication can also be seen as calculating the objects arranged in a rectangle (integer) or finding the area of a rectangle with a given side length. The area of the rectangle does not depend on which side is measured first, which shows the exchange property. The product of two measured values is a new type of measurement, for example, multiplying the length of two sides of a rectangle to get its area, which is the theme of size analysis.
In the process of arithmetic development of various civilizations, the generation of multiplication operation is a very important step. A civilization can successfully develop counting methods and addition and subtraction operations, but it is not so easy to create simple and feasible multiplication methods.
The vertical calculation of multiplication we use seems simple, but in fact we need to master the formula table of 99 multiplication in advance; Considering this, this vertical calculation is not perfect. We are about to see what different multiplication methods have been created by different civilizations in the process of mathematical development, and some of them can even completely abandon the multiplication table.