input: 
  def matrixElementWiseMultiplication(A, B):
      """ Given two matrices A and B, produce a matrix C where each element in C is the product of
      the corresponding elements of A and B.
      >>> matrixElementWiseMultiplication([[3, 4], [1, 2]], [[7, 5], [0, 1]])
      [[21, 20], [0, 2]]
      """
      C = [[A[i][j] * B[i][j] for j in range(len(A[0]))] for i in range(len(A))]
      return C
  
output:     C = [[A[i][j] * B[i][j] for j in range(len(A[0]))] for i in range(len(A))]
      return C