input: Write a function that prompts the user to enter the value of the radius to calculate the area of a circle. The function should take no parameters, and it should print the calculated area.
  
  def calculate_circle_area():
      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)
  
  assert calculate_circle_area()
output: def calculate_circle_area():
      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)