Water hardness in a reservoir is measured as $14.5 \text{ grains per US gallon}$ of calcium carbonate. Convert this hardness level to milligrams per liter ($\text{mg/L}$). (Take $1 \text{ grain} \approx 64.7989 \text{ mg}$ and $1 \text{ US gallon} \approx 3.78541 \text{ liters}$)