udunits/src/main/java/ucar/units/ScaledUnit.java
@Override
    protected Unit myDivideBy(final Unit that) throws OperationException {
        return that instanceof ScaledUnit
                ? new ScaledUnit(getScale() / ((ScaledUnit) that).getScale(),
                        getUnit().divideBy(((ScaledUnit) that).getUnit()))
                : new ScaledUnit(getScale(), getUnit().divideBy(that));
    }
@Override
    protected Unit myDivideBy(final Unit that) throws OperationException {
        return that instanceof ScaledUnit
                ? new ScaledUnit(getScale() / ((ScaledUnit) that).getScale(),
                        getUnit().divideBy(((ScaledUnit) that).getUnit()))
                : new ScaledUnit(getScale(), getUnit().divideBy(that));
    }
Divides this unit by another unit.

@param that
The other unit.
@return The quotient of this unit divided by the other unit.
@throws OperationException
Can't divide these units.