public void CompositeUnitMultiplication_When_PrefixesAreDifferent_Then_NotationShouldBeLhsPrefixTimesRhsPrefix()
        {
            var testee = new DerivedUnit(null, MeterUnit * CentiMeterUnitExpression);

            testee.ToString().Should().Be("m*cm");
        }
        public void CompositeUnitDivision_When_PrefixesAreDifferent_Then_NotationShouldBeRhsPrefixSquared()
        {
            var testee = new DerivedUnit(null, MeterUnit / CentiMeterUnitExpression);

            testee.ToString().Should().Be("m/cm");
        }