We are given a N*M grid, print the number of rectangles in it.

Examples:

Input  : N = 2, M = 2
Output : 9
There are 4 rectangles of size 1 x 1.
There are 2 rectangles of size 1 x 2
There are 2 rectangles of size 2 x 1
There is  1 rectangle of size 2 X 2.

Input  : N = 5, M = 4
Output : 150

Example : 
Input : 
The first line of input contains an integer T denoting the Test cases. Then T test cases follow. 
Second line contains N and M 

Output : 
Number of Rectangles. 

Constraints :
1 ≤ T ≤ 100
1 ≤ N M ≤ 100
Input : 
2
2 2 
5 4

Output : 
9
150