668 US gallons in US customary cups
Result
The conversion result is: 668 US gallons is equivalent to 10688 US customary cups.[1]
Conversion formula
How to convert 668 US gallons to US customary cups?
We know (by definition) that: 1 usgallon ≈ 16 uscup.
We can set up a proportion to solve for the number of US customary cups.
1 usgallon / 668 usgallon ≈ 16 uscup / x uscup
Now, we cross multiply to solve for our unknown x:
x uscup ≈ (668 usgallon / 1 usgallon) * 16 uscup → x uscup ≈ 10688 uscup
Conclusion:
668 usgallon ≈ 10688 uscup
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US customary cup is equal to 9.3562874251497e-05 times 668 US gallons.
It can also be expressed as: 668 US gallons is equal to 1 / 9.3562874251497e-05 US customary cups.
Approximation
An approximate numerical result would be: six hundred and sixty-eight US gallons is about ten thousand, six hundred and eighty-eight US customary cups, or alternatively, a US customary cup is about zero times six hundred and sixty-eight US gallons.
Footnotes
[1] 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.