public void CalculateMultiplierInvalid()
 {
     Assert.AreEqual(Calculator.Multiplier(2, 1), 2);
 }
 public void CalculateMultiplierDouble()
 {
     Assert.AreEqual(Calculator.Multiplier(2, 2.25), 4.5);
     Assert.AreEqual(Calculator.Multiplier(2.25, 2), 4.5);
 }