A fen is one of the main types of wetland, the others being grassy marshes, forested swamps, and peaty bogs. Along with bogs, fens are a kind of mire. Fens are usually fed by mineral-rich surface water or groundwater.
Quick Answer. A gallon has 4 quarts. Each quart has 2 pints, so a gallon also contains 8 pints. Each pint is 2 cups, so a gallon has 16 cups.
30 Quarts are equal to 7.5 gallons, or 7 gallons and 2 quarts.   Since there are 4 quarts in a gallon, we can divide 30 by 4 to get  7.5.