A solution of stearic acid $\left({\mathrm{C}}_{18}{\mathrm{H}}_{36}{\mathrm{O}}_2;\mathrm{M}=284\right)$ in benzene contains $1.42 gm$ acid per $L$. When this solution $(100 L)$ is dropped on surface, ${\mathrm{C}}_6{\mathrm{H}}_6$ gets evaporated and acid forms a unimolecular layer on the surface. If it covers an area $6020 {\mathrm{crn}}^2$with unimolecular film, find the area covered by one molecule of acid.