input: from typing import List
  
  def calculate_circle_area(radius: float, Pi: float = 3.14) -> float:
      """
      Calculate the area of a circle given its radius.
      
      >>> calculate_circle_area(5)
      78.5
      >>> calculate_circle_area(3.5)
      38.465
      """
      return Pi * (radius ** 2)
output:     return Pi * (radius ** 2)