640 US quarts in US dry barrels

Conversion formula
How to convert 640 US quarts to US dry barrels?

We know (by definition) that: $1\mathrm{usquart}\approx 0.00818452380952381\mathrm{drybarrel}$

We can set up a proportion to solve for the number of US dry barrels.

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

Conclusion: 640 ⁢ usquart ≈ 5.238095238095238 ⁢ drybarrel

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US dry barrel is equal to 0.190909090909091 times 640 US quarts.

It can also be expressed as: 640 US quarts is equal to $\frac{1}{\mathrm{0.190909090909091}}$ US dry barrels.

Approximation

An approximate numerical result would be: six hundred and forty US quarts is about five point two four US dry barrels, or alternatively, a US dry barrel is about zero point one nine times six hundred and forty US quarts.