input: 
  def create_rectangle_class() -> str:
      """Create a Python class called Rectangle to represent a two-dimensional rectangle with a length and width.
      The class should have an __init__ method to initialize the length and width, and an area method to calculate the area of the rectangle.
      Example:
      >>> rect = Rectangle(4, 5)
      >>> rect.area()
      20
      """
  
output:     
      class Rectangle:
          def __init__(self, length: float, width: float):
              self.length = length
              self.width = width
          
          def area(self) -> float:
              return self.length * self.width
  