668 US gallons in US customary cups

Conversion formula
How to convert 668 US gallons to US customary cups?

We know (by definition) that: $1\mathrm{usgallon}\approx 16\mathrm{uscup}$

We can set up a proportion to solve for the number of US customary cups.

Now, we cross multiply to solve for our unknown $x$:

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 $\frac{1}{\mathrm{9.3562874251497e-05}}$ 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.