The pressure of a moist gas at $27^{\circ} \mathrm{C}$ is 4 atm . The volume of the container is doubled at the same temperature. The new pressure of the moist gas is .... $\times 10^{-1} \mathrm{~atm}$. (Nearest integer) (Given: The yapour pressure of water at $27^{\circ} \mathrm{C}$ is 0.4 atm )