To convert gallons to quarts, you can use the conversion factor that 1 gallon is equal to 4 quarts.
So, to convert 264 gallons per day to quarts per day:
\[ 264 \text{ gallons/day} \times 4 \text{ quarts/gallon} = 1056 \text{ quarts/day} \]
Therefore, 264 gallons/day = 1056 quarts/day.