input: def elementwise_product(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.
      
      >>> elementwise_product([[3, 4], [1, 2]], [[7, 5], [0, 1]])
      [[21, 20], [0, 2]]
      """
      
      if len(A) != len(B) or len(A[0]) != len(B[0]):
          return "Matrices must be of same dimensions"
      
      C = [[0 for _ in range(len(A[0]))] for _ in range(len(A))]
      
      for i in range(len(A)):
          for j in range(len(A[0])):
              C[i][j] = A[i][j] * B[i][j]
      
      return C
output:     return C