\sum{(2m-1)(2j-1)}
m for rows and j for columns
There is a 7 * 11 chessboard placed in front of you. what you have to do is to find the number of rectangles of all shapes and sizes but of odd dimensions(i.e. both the length and breadth have to be odd) !!!
......check out!!!
ya rite
by the way
-when spring comes, it melts the snow one flake at a time…
so please do it bit slowly and step by step whenever u try :P