A piston$-$cylinder device initially at $0\mathrm{.}70$m$3$

contains nitrogen gas at $600$ kPa and $300$ K$.$ Now the gas is compressed isothermally to a volume of $0\mathrm{.}2$ m$3$

$.$ The work done on the gas during this compression process is $\_\_\_\_\_\_\_\_$blank kJ$.$