How to convert 639 US gallons to dry quarts?
We know (by definition) that:
We can set up a proportion to solve for the number of dry quarts.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 dry quart is equal to 0.000455261027444126 times 639 US gallons.
It can also be expressed as: 639 US gallons is equal to dry quarts.
An approximate numerical result would be: six hundred and thirty-nine US gallons is about two thousand, one hundred and ninety-six point five three dry quarts, or alternatively, a dry quart is about zero times six hundred and thirty-nine US gallons.
 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.