new_contents: def simple_areas(*args):
      if len(args) == 1:
          a = args[0]**2*.78539816
      elif len(args) == 2:
          a = args[0]*args[1]
      elif len(args) == 3:
          s = sum(args) / 2
          a = (s*(s-args[0])*(s-args[1])*(s-args[2]))**.5
      return int((a * 100) + .5) / 100
  
subject: Create simple-areas.py