Ideal gas equation

A fixed mass of ideal gas expands at constant pressure from volume $1.5 \times 10^{-3}$ m$^3$ to $3.0 \times 10^{-3}$ m$^3$ at a pressure of $2.0 \times 10^{5}$ Pa. Using the equation for work done in a constant-pressure process, calculate the work done by the gas.