The answer is the first one
0.1 lengths is left of centimeters
There are 4 quarts in 1 gallon. You would multiply 4 qts x 9 gallons for a total of 36 quarts. He used 10 quarts and 3 gallons (12 quarts) leaving 14 quarts. There are 2 pints in every quart so you would multiply 2 x 14 for 28 quarts. I hope that helped!!!