Problem 85
Counting Rectangles
By counting carefully it can be seen that a rectangular grid measuring

Although there exists no rectangular grid that contains exactly two million rectangles, find the area of the grid with the nearest solution.
数长方形
在一个

不存在任意大小的长方形网格中包含有恰好两百万个长方形。求包含长方形的数目最接近两百万的长方形网格的面积。
Gitalking ...