Density is weight by volume.
First. If you divide the weight by density you can find the volume
Second you must convert the ML in to Liters.
[tex] \frac{321 \frac{g}{1}}{0.84 \frac{g}{mL}} = \frac{321(g)(mL)}{0.84g}=\frac{321mL}{0.84}=382.14mL[/tex]
1L=1000ml
[tex] \frac{1L}{1000mL} [/tex]
[tex](382.14mL)( \frac{1L}{1000mL})= \frac{(382.14mL)(L)}{1000mL} =\frac{382.14L}{1000}=0.38214L[/tex]
0.38214 Liters.