850 kg => x m³
1 kg => 1 : 2800 m³
850 kg => $${\frac{{\mathtt{1}}{\mathtt{\,\times\,}}{\mathtt{850}}}{{\mathtt{2\,800}}}}$$ m³ =
$${\frac{{\mathtt{850}}}{{\mathtt{2\,800}}}} = {\frac{{\mathtt{17}}}{{\mathtt{56}}}} = {\mathtt{0.303\: \!571\: \!428\: \!571\: \!428\: \!6}}$$ m³ gerundet 0,304 m³ .
http://www.kurztutorial.info/programme/dichte/rechner.html
https://de.wikibooks.org/wiki/Tabellensammlung_Chemie/_Dichte_fester_Stoffe
850 kg => x m³
1 kg => 1 : 2800 m³
850 kg => $${\frac{{\mathtt{1}}{\mathtt{\,\times\,}}{\mathtt{850}}}{{\mathtt{2\,800}}}}$$ m³ =
$${\frac{{\mathtt{850}}}{{\mathtt{2\,800}}}} = {\frac{{\mathtt{17}}}{{\mathtt{56}}}} = {\mathtt{0.303\: \!571\: \!428\: \!571\: \!428\: \!6}}$$ m³ gerundet 0,304 m³ .