When a () is multiplied by a, the product is greater than 5 / 9; when a () is multiplied by a, the product is less than 5 / 9 In addition, the side length of a square is one fourth of a meter, its perimeter is () meters, and its area is () square meters. Why?

When a (> 1), the product is greater than five ninths（

What is the product of the difference between 7 / 8 and 1 / 2 multiplied by the sum of 5 / 9 and 1 / 3

Hello
（7/8-1/2）x(5/9+1/3)
=3/8x8/9
=1/3
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