How to convert 331 US gallons to US customary cups?
We know (by definition) that:
We can set up a proportion to solve for the number of US customary cups.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US customary cup is equal to 0.000188821752265861 times 331 US gallons.
It can also be expressed as: 331 US gallons is equal to US customary cups.
An approximate numerical result would be: three hundred and thirty-one US gallons is about five thousand, two hundred and ninety-six US customary cups, or alternatively, a US customary cup is about zero times three hundred and thirty-one US gallons.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.