[填空题]
In humid climates, people constant*b ;-lvskg -ghly dehumidify their cellars to prevenb gw uozx*w7:ne(w8i9t rot and mildew. *gxzwww(u i8on 7:eb9 If the cellar in a house (kept at 20$^{\circ} $C) has 95 $m^2$ of floor space and a ceiling height of 2.8 m, what is the mass of water that must be removed from it to drop the humidity from 95% to a more reasonable 30%? kg