Dividend = quotient. ?

Dividend quotient = divisor.

Quotient × frequency divider = frequency divider.

Multiply two digits and divide by one digit (including the remainder).

Multiply two digits by two digits.

increase

It can also be regarded as calculating objects arranged in rectangles (integers) or finding an 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.