input: Write a function to take two matrices, A and B, and produce a matrix C where each element is the product of the corresponding elements of A and B. If the matrices cannot be multiplied, return "Matrix multiplication not possible".
  assert matrixMultiplication([[3, 4], [1, 2]], [[7, 5], [0, 1]])==[[21, 20], [0, 2]]
  assert matrixMultiplication([[1, 2], [3, 4]], [[2, 0], [1, 2]])==[[4, 4], [10, 8]]
output: def matrixMultiplication(A, B):
      if len(A) != len(B) or len(A[0]) != len(B[0]):
          return "Matrix multiplication not possible"
      C = [[A[i][j] * B[i][j] for j in range(len(A[0]))] for i in range(len(A))]
      return C