The proposal is to provide a function In(var, unit), which provides the numerical value of the variable for the given unit.
A possible operator form could be
var in unit
just as you would write at the axes of a diagram
For ordinary units this is not essential, because you just divide by the unit, but for non-absolute temperature units this would simplify the appearance.
If we had Mathcad style placeholders for x and y, then this would give perfect axis labels.