text: import math
  
  
  class Circle(object):
      def __init__(self, r=1.0, precision=2):
          self.pi = float("{0:.{1}f}".format(math.pi, precision))
          self.precision = precision
          self.r = r
      
      def circumference(self):
          formula = 2 * self.pi * self.r
          return float("{0:.{1}f}".format(formula, self.precision))
  
      def area(self):
          formula = 2 * self.pi * math.pow(self.r, 2)
          return float("{0:.{1}f}".format(formula, self.precision))
  
      def __str__(self):
          return f"Circumference is: {self.circumference()}", f"Area is: {self.area()}"
  
  
  for i in range(54):
      print(i, "=>", Circle(r=1, precision=i).__str__())
  