pressure from formula and lammps is different by one magnitude?

Hi, I am confused with pressure calculated from lammps itself and the method posted on the website (
The former one is lower than the latter one by roughly 1 magnitude.

Does that matter with ghost atoms in the codes, since I see the total atoms is counted by nall = nlocal + nghost.
Thanks for your attentions.

Best wishes,

Ghost atoms are handled correctly. How do you know the pressure
is off by 10x?