Calculate the number of vacancies per cubic meter for some metal, M$,$ at $826\backslash$deg C$.$ The energy for vacancy formation is $0\mathrm{.}88$ eV$/$atom$,$ while the density and atomic weight for this metal are $8\mathrm{.}01$ g$/$cm$3($at $826\backslash$deg C$)$ and $72\mathrm{.}00$ g$/$mol$,$ respectively.