input: 
  def calculate_circle_area(radius: float) -> float:
      """Calculate the area of a circle based on the given radius.
  
      >>> calculate_circle_area(5)
      78.5
      >>> calculate_circle_area(0)
      0.0
      >>> calculate_circle_area(7.5)
      176.625
      """
      Pi = 3.14
      area = Pi * radius**2
      return area
  
output:     Pi = 3.14
      area = Pi * radius**2
      return area