Molar gas volume

Calcium carbonate decomposes on heating according to $\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2$. If 5.00 g of CaCO$_3$ ($M_r = 100$) is completely decomposed, what volume of CO$_2$ is produced at room temperature and pressure (RTP), where 1 mol of gas occupies 24 dm$^3$?