text: import math
  
  def addition(a,b):
      return a+b
  
  def subtraction(a, b):
      a = int(a)
      b = int(b)
      c = b - a
      return c
  
  def multiplication(a,b):
      return a*b
  
  def division(a,b):
      c=b/a
      return round(c,9)
  
  def square(a):
      d = a**2
      return d
  
  def square_root(a):
      c=math.sqrt(a)
      return round(c,8)
  
  class Calculator:
      result=0
  
      def _init_(self):
          pass
  
      def add(self, a, b):
          self.result= addition(a,b)
          return self.result
  
      def subtract(self, a, b):
          self.result= subtraction(a,b)
          return self.result
  
      def multiply(self, a, b):
          self.result= multiplication(a,b)
          return self.result
  
      def divide(self, a, b):
          self.result= division(a,b)
          return self.result
  
      def doubled(self, a):
          self.result = square(a)
          return self.result
  
      def sq_root(self, a):
          self.result = square_root(a)
          return self.result
      