In an internal combustion engine, the air-fuel mixture at the end of the ignition phase has volume 7.34×10?4 m3 and pressure 3.12×106 Pa. The air-fuel mixture expands adiabatically, pushing the piston out, to a volume of 2.82×10?3 m3. Assume the air-fuel mixture behaves like an ideal gas. If ? = 1.42 for the air-fuel mixture, what is the final pressure after the expansion?