Calculate the average electrical power output, in kilowatts, for a wind turbine scheduled for installation in an area with an average wind velocity of $2\mathrm{.}1$ m$/$s$.$ The turbine has a blade diameter of $15$ m$,$ an overall efficiency of $30\%,$ and operates in an environment with an average air density of $1\mathrm{.}250$ kg$/$m$^3.$