A blackbody of surface area $\;100 cm^{2}\;$ is placed inside an enclosure . The enclosure has a constant temperature at $\;127^{0}C\;$ & the blackbody is maintained at $\;227^{0}C\;$ by heating it electrically . If $\;\sigma=6 \times 10^{-8} Wm^{-2}K^{-4}\;$ , electric power needed to maintain the temperature