Given two square Matrices A[][] and B[][]. Your task is to complete the function multiply which stores the multiplied matrices in a new matrix C[][].
 

Example 1:

Input: 
N = 2
A[][] = {{7, 8}, {2 , 9}}
B[][] = {{14, 5}, {5, 18}}

Output: 
C[][] = {{138, 179}, {73, 172}}

Example 2:

Input: 
N = 2
A[][] = {{17, 4}, {17 , 16}}
B[][] = {{9, 2}, {7, 1}}

Output: 
C[][] = {{181, 38}, {265, 50}}

Constraints:
1 <=T<= 100
1 <= N <= 20