The specific heat of combustion of an alternative fuel is measured as $38.50 \text{ MJ/kg}$. Express this energy density in British thermal units per pound ($\text{Btu/lb}$). (Take $1 \text{ MJ} \approx 947.817 \text{ Btu}$ and $1 \text{ kg} \approx 2.20462 \text{ lb}$)