input: Write a python function to check if a number is a multiple of five using a class.
  assert MultipleOfFive(10).is_multiple_of_five() == True
  assert MultipleOfFive(12).is_multiple_of_five() == False
  assert MultipleOfFive(25).is_multiple_of_five() == True
output: class MultipleOfFive:
      def __init__(self, number):
          self.number = number
  
      def is_multiple_of_five(self):
          return self.number % 5 == 0