A rail locomotive has a power-to-weight ratio of $18.5 \text{ horsepower per short ton}$. Convert this ratio to Watts per kilogram ($\text{W/kg}$). (Take $1 \text{ mechanical horsepower} = 745.7 \text{ W}$, $1 \text{ short ton} = 2000 \text{ lb}$, and $1 \text{ lb} \approx 0.453592 \text{ kg}$)