input: def calculate_circle_area():
      """Calculate and print the area of a circle given user input for the radius.
      >>> calculate_circle_area() # Assuming user inputs "5"
      The area of the circle is: 78.5
      """
  Pi = 3.14
  radius = float(input("Please enter the radius of the circle: "))
  area = Pi * radius ** 2
  print("The area of the circle is:", area)
output:     Pi = 3.14
      radius = float(input("Please enter the radius of the circle: "))
      area = Pi * radius ** 2
      print("The area of the circle is:", area)