Given a binary matrix, Your task is to complete the function **maxArea** which the maximum size rectangle area in a binary-sub-matrix with all 1’s. The function takes 3 arguments the first argument is the Matrix M[ ] [ ] and the next two are two integers n and m which denotes the size of the matrix M. Your function should return an integer denoting the area of the maximum rectangle .

**Input:**

The first line of input is an integer T denoting the no of test cases . Then T test cases follow. The first line of each test case are 2 integers n and m denoting the size of the matrix M . Then in the next line are n*m space separated values of the matrix M.

**Output:**

For each test case output will be the area of the maximum rectangle .

**Constraints:**

1<=T<=50

1<=n,m<=50

0<=M[][]<=1

**Example:
Input**

1

4 4

0 1 1 0 1 1 1 1 1 1 1 1 1 1 0 0

8

For the above test case the matrix will look like

0 1 1 0

1 1 1 1

1 1 1 1

1 1 0 0

the max size rectangle is

1 1 1 1

1 1 1 1

and area is 4 *2 = 8

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