input: def create_rectangle_class(length: float, width: float) -> Rectangle:
      """ Create a Python class called Rectangle to represent a two-dimensional rectangle with a length and width.
      >>> create_rectangle_class(4.0, 5.0).area()
      20.0
      >>> create_rectangle_class(3.0, 3.0).area()
      9.0
      """
      class Rectangle:
          def __init__(self, length, width):
              self.length = length
              self.width = width
  
          def area(self):
              return self.length * self.width
  
      return Rectangle(length, width)
output:     class Rectangle:
          def __init__(self, length, width):
              self.length = length
              self.width = width
  
          def area(self):
              return self.length * self.width
  
      return Rectangle(length, width)