How to convert 689 US customary cups to US gallons?
We know (by definition) that:
We can set up a proportion to solve for the number of US gallons.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US gallon is equal to 0.02322206095791 times 689 US customary cups.
It can also be expressed as: 689 US customary cups is equal to US gallons.
An approximate numerical result would be: six hundred and eighty-nine US customary cups is about forty-three point zero six US gallons, or alternatively, a US gallon is about zero point zero two times six hundred and eighty-nine US customary cups.
 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.