input: Write a python function to perform basic arithmetic operations using a class.
  assert perform_operations(10, 5) == (15, 5, 50, 2)
  assert perform_operations(20, 4) == (24, 16, 80, 5)
  assert perform_operations(7, 2) == (9, 5, 14, 3.5)
output: def perform_operations(a, b):
      class Arithmetic:
          def __init__(self, a, b):
              self.a = a
              self.b = b
  
          def add(self):
              return self.a + self.b
  
          def subtract(self):
              return self.a - self.b
  
          def multiply(self):
              return self.a * self.b
  
          def divide(self):
              return self.a / self.b
  
      operation = Arithmetic(a, b)
      return (operation.add(), operation.subtract(), operation.multiply(), operation.divide())