public void TestMultiply()
{
UnitCartesian original = new UnitCartesian(2.0, 3.0, 6.0);
Cartesian multiplied = original * 7.0;
Assert.AreEqual(2.0, multiplied.X);
Assert.AreEqual(3.0, multiplied.Y);
Assert.AreEqual(6.0, multiplied.Z);
multiplied = 7.0 * original;
Assert.AreEqual(2.0, multiplied.X);
Assert.AreEqual(3.0, multiplied.Y);
Assert.AreEqual(6.0, multiplied.Z);
}