The length of a rectangle is reduced by 1/4, the width is increased by 1/5, and the area is reduced by 40 square centimeters. What is the area of the original rectangle?
一个长方形，长减少四分之一，宽增加五分之一，面积减少40平方厘米，原来长方形的面积是多少平方厘米？
<result>400</result>