75/4= 18.75
7.64 US gallons = 5,867.52 US teaspoons.
If you have a gallon, you only can have one gallon.
There are 768 teaspoons in one US gallon. This would make a teaspoon 1/768th of a gallon. There are also 48 teaspoons in a cup and 3 teaspoons make up one tablespoon.
A 20 Gallon tank can hold up to 20 gallons of water.
7.48 gallons
192 x .0024 = 0.4608 teaspoon
21.1 gallons
Approx 0.033 gallons for 50 US teaspoons.
5 gallons
1
9200 Gallons
1/8.33 gallons or ~0.12 gallon(US) or 1/10 gallon or 0.1 gallon (BI)