Yes! aera = surface in Unities used! So maybe 13 cm2, 107 m2 , 21 m3 for a surface 5 mm3, 15 m3 for a volume etc...
or 17 if there is no unities used

Ps the native Aera/volume is fine for direct result but not for specific material, density etc...! ;)

Thank you Pilou.
In detail: If I work in mm the area is mm2 ?

of course yes!