input: 
  def elementWiseProduct(A, B):
      """ 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.
      >>> elementWiseProduct([[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