text: class Demo:
      def mymul(self,mynum1=None,mynum2=None,mynum3=None):
          if mynum1!=None and mynum2!= None and mynum3!= None:
              print(f'The Product of {mynum1},{mynum2} and {mynum3} are:',mynum1*mynum2*mynum3)
          elif mynum1!=None and mynum2!= None:
              print(f'The Product of {mynum1} and {mynum2}:',mynum1*mynum2)
          else:
              print(f'Please provide either 2 or 3 arguments')
  
  myobj=Demo()
  myobj.mymul(10,20,30)
  myobj.mymul(10,20)
  myobj.mymul(10)
  