In 1992, residents of Arkansas consumed, on average, 11.4 L of gasoline per vehicle per day. If this amount of gasoline burns completely in a pure combustion reaction, it will release 4.3 * 10^8 J of energy. Suppose this amount of energy is transferred by heat from a quantity of gas confined in a very large cylinder. The cylinder, however, is equipped with a piston, and shortly after the energy is transferred by heat from the cylinder, work is done on the gas. The magnitude of the energy transferred by work is equal to one-third the magnitude of the energy transferred by heat. If the initial internal energy of the gas is 1.00 * 10^9 J, what is the final internal energy?