input: Write a python function to perform basic arithmetic operations on two numbers.
  assert arithmetic_operations(10, 5) == (15, 5, 50, 2.0)
  assert arithmetic_operations(20, 4) == (24, 16, 80, 5.0)
  assert arithmetic_operations(7, 3) == (10, 4, 21, 2.3333333333333335)
output: def arithmetic_operations(a, b):
      addition = a + b
      subtraction = a - b
      multiplication = a * b
      division = a / b
      return (addition, subtraction, multiplication, division)