In the Natural Units environment, these procedures override the top-level max and min functions.  If any of the arguments have units associated with them, all units are converted to the units of the first argument, and then the global procedure of the same name is called on the unitless arguments.

$\mathrm{with}\left(\mathrm{Units}\left[\mathrm{Natural}\right]\right)\:$

$\min \left(\frac{3}{2}m\,1.49\mathrm{ft}\right)$

$1.49⟦\mathrm{ft}⟧$

$\mathrm{dis}≔\max \left(x\mathrm{furlong}\,\frac{3}{2}\mathrm{ft}\,120\mathrm{cm}\,17\mathrm{inches}\right)$

$\mathrm{dis}≔\max \left(\frac{6}{5}\,\frac{25146x}{125}\right)⟦m⟧$

$\mathrm{dis}≔\mathrm{convert}\left(\mathrm{dis}\,'\mathrm{units}'\,m\right)$

$\mathrm{dis}≔\max \left(\frac{6}{5}\,\frac{25146x}{125}\right)⟦m⟧$

$x≔3$

$x≔3$

$\mathrm{dis}$

$\frac{75438}{125}⟦m⟧$