Calculating volume in lammps

Hello, I am trying to calculate volume of a bulk liquid at different temperature and store them in a variable. Because I need the square of these volume values. I did not find any compute command for this. How to solve this problem?

Hello, I am trying to calculate volume of a bulk liquid at different
temperature and store them in a variable. Because I need the square of
these volume values. I did not find any compute command for this. How to
solve this problem?

since you say, you have a bulk system, the total volume of your liquid
would be the volume of the simulation box. ​the volume of the simulation
box is available through the thermo keyword "vol". to compute the square of
that you may use $(vol*vol)​ or construct an equal style variable for it.
please see the documentation of the variable command for more details.
axel.