A sample of an ideal gas inside a cylinder with a movable piston is maintained at a constant pressure of \(2.0 \times 10^5 \text{ Pa}\). The gas undergoes an isobaric expansion, causing its volume to increase from \(1.0 \times 10^{-3} \text{ m}^3\) to \(4.0 \times 10^{-3} \text{ m}^3\). Which of the following correctly pairs the magnitude of the work done by the gas during the expansion with the change in the internal energy of the gas?