# Summation

Time Limit: 2 Seconds Memory Limit: 32768 KB

In each cell of *n*×*m* table a natural number is written which shows the number of cells located left or below that cell.

You are to write a program that reads size of a table (*n* and *m*) and calculate the total sum of all cells in the table.

## Input

The first line of the input includes the number of test cases, 1≤*t*≤100. First line of each test case contains two integers, 1≤*n*≤100, the number of the rows and 1≤*m*≤100, the number of the columns.

## Output

For each test case, output a line containing the sum of all the numbers of table.

## Sample Input

3 2 2 2 3 3 4

## Sample Output

4 9 30Submit

Source: 12th Iran Nationwide Internet Contest I