A cylinder and piston, whose cross-sectional area is 1 square inch, contain 16 cubic inches of gas under a pressure of 40 pounds per square inch. If the pressure and the volume of the gas are related adiabatically (i.e., without loss of heat) by the law pv1.4 = c (a constant), how much work is done by the piston in compressing the gas to 2 cubic inches?