The length of a rectangle is 80 decimeters, and the width is 6 decimeters. With its (4/5), it can just make a cube wooden box. What is the length of the side of the cube wooden box?
一个长方形长是80分米，宽是6分米，用它的(4/5)，刚好可以做一个正方体木盒，这个正方体木盒的棱长是多少分米．
<result>8</result>