In order to answer this question, we have to know that 1 gallon is defined as 4 quarts. Therefore, based on this knowledge, we can easily convert between number of gallons and number of quarts by simply taking the volume in quarts and divide it by 4 which would then result in the volume in gallons. In this particular case, we can deduce the number of gallons in 12 quarts mathematically by:

12 quarts = 12 / 4 gallons = 3 gallons.

Therefore, 12 quarts equal to 3 gallons exactly.

I hope this answers your question and allow you more easily convert between quarts and gallons in the future. Good luck!

To find the number of gallons in 12 quarts:

1) Find the number of quarts in 1 gallon (4).

2) Divide the number of quarts (12) by the number of quarts in 1 gallon (4).

12/4 = 3

3) Label the answer as "gallons".

12 quarts = 3 gallons