The length of a rectangle is (1/2) the side length of a square, and the width is (1/4) the side length of the square, so how much less is the perimeter of the rectangle than the perimeter of the square
一个长方形的长是一个正方形的边长的(1/2)，宽是这个正方形边长的(1/4)，那么这个长方形的周长比正方形的周长少多少
<result>0.625</result>