There are 4 quarts in a gallon, so 8.5 gallons x 4 (quarts/gallon) = 34 quarts.
(Take note how the terms "gallons" cancel each other out, one numerator and one denominator, which leaves you with just quarts. This is a useful to know when doing conversions)
1 gal = 4 quarts
8 gal = 32 quarts
6 gallons, 2 quarts
There are 30 quarts in 5 gallons and 8 quarts in 2 gallons
Zero gallons, three quarts
0.42 US gallons is 1.68 quarts.
27 US quarts = 6.75 US gallons
There are 2 quarts in .5 gallons.
8 US gallons = 32 US quarts
192 quarts
20 quarts.
4 quarts to a gallon. 5000/4 = 1250 gallons
10 quarts.
1 gallon = 4 quarts to 84 gallons = 84*4 = 336 quarts. Simple!