A solution is created by dissolving oxygen in water at $20C.$ If the concentration of oxygen in the water is $0\mathrm{.}012m,$ what is the partial pressure $($atm$)$ of the oxygen gas above the solution? Henry's law constant for oxygen at $20C$ is $1\mathrm{.}43{10}^{-3}\frac{m}{a}tm.$ Enter your answer with no units.