input: 
  import math
  
  def area_circle(radius: float) -> float:
      """Compute the area of a circle given the radius.
      >>> area_circle(5)
      78.54
      >>> area_circle(1)
      3.14
      """
      return math.pi * (radius ** 2)
  
output:     return round(math.pi * (radius ** 2), 2)