680 dry gallons in US customary cups

Conversion formula
How to convert 680 dry gallons to US customary cups?

We know (by definition) that: $1\mathrm{drygallon}\approx 18.618354978355\mathrm{uscup}$

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: 680 ⁢ drygallon ≈ 12660.4813852814 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 7.89859381778772e-05 times 680 dry gallons.

It can also be expressed as: 680 dry gallons is equal to $\frac{1}{\mathrm{7.89859381778772e-05}}$ US customary cups.

Approximation

An approximate numerical result would be: six hundred and eighty dry gallons is about twelve thousand, six hundred and sixty point four seven US customary cups, or alternatively, a US customary cup is about zero times six hundred and eighty dry gallons.