input: Write a function to calculate the area of a circle given the radius. Return the area rounded to two decimal places.
  
  def area_circle(radius):
      return round(math.pi * (radius ** 2), 2)
  
  assert area_circle(5) == 78.54
  assert area_circle(0) == 0.00
  assert area_circle(1) == 3.14
  
output: def area_circle(radius):
      return round(math.pi * (radius ** 2), 2)