665 dry quarts in US gallons
Result
The conversion result is: 665 dry quarts is equivalent to 193.45634469697 US gallons.[1]
Conversion formula
How to convert 665 dry quarts to US gallons?
We know (by definition) that: 1 dryquart ≈ 0.290911796536797 usgallon.
We can set up a proportion to solve for the number of US gallons.
1 dryquart / 665 dryquart ≈ 0.290911796536797 usgallon / x usgallon
Now, we cross multiply to solve for our unknown x:
x usgallon ≈ (665 dryquart / 1 dryquart) * 0.290911796536797 usgallon → x usgallon ≈ 193.45634469697 usgallon
Conclusion:
665 dryquart ≈ 193.45634469697 usgallon

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US gallon is equal to 0.0051691248563928 times 665 dry quarts.
It can also be expressed as: 665 dry quarts is equal to 1 / 0.0051691248563928 US gallons.
Approximation
An approximate numerical result would be: six hundred and sixty-five dry quarts is about one hundred and ninety-three point four six US gallons, or alternatively, a US gallon is about zero point zero one times six hundred and sixty-five dry quarts.
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.