A van der Waals gas has $T_c=304\mathrm{K}$ and $V_c=0.128\mathrm{L}\mathrm{mo}{\mathrm{l}}^{-1}$. Using $Z_c=3/8$ and $R=0.0821\mathrm{L}\mathrm{atm}{\mathrm{K}}^{-1}\mathrm{mo}{\mathrm{l}}^{-1}$, its critical pressure in atm (one decimal) is

Numerical answer type, answer in atm, tolerance 0.3.