input: Write a function to calculate the area of a circle given its 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(3) == 28.27
  assert area_circle(0) == 0.00
  assert area_circle(7) == 153.94
output: def area_circle(radius):
      return round(math.pi * (radius ** 2), 2)