input: from typing import Tuple
  
  def calculate_circle_area() -> Tuple[float, float]:
      """ Prompt the user to enter the value of radius to calculate the area of a circle.
      Returns a tuple containing the radius and the calculated area.
      >>> calculate_circle_area()
      Enter radius: 5.0
      (5.0, 78.5)
      >>> calculate_circle_area()
      Enter radius: 1.0
      (1.0, 3.14)
      """
      
      Pi = 3.14
      radius = float(input("Enter radius: "))
      area = Pi * radius ** 2
      return radius, area
output:     Pi = 3.14
      radius = float(input("Enter radius: "))
      area = Pi * radius ** 2
      return radius, area