input: 
  from typing import List
  
  def calculate_circle_area() -> float:
      """ Calculate the area of a circle based on the radius provided by the user.
      >>> calculate_circle_area()  # Assume user input is 5.0
      78.5
      >>> calculate_circle_area()  # Assume user input is 10.0
      314.0
      """
      Pi = 3.14
      radius = float(input("Please enter the radius of the circle: "))
      area = Pi * radius ** 2
      return area
  
output:     Pi = 3.14
      radius = float(input("Please enter the radius of the circle: "))
      area = Pi * radius ** 2
      return area