How to convert 680 imperial gallons to US dry barrels?
We know (by definition) that:
We can set up a proportion to solve for the number of US dry barrels.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US dry barrel is equal to 0.0374035462614091 times 680 imperial gallons.
It can also be expressed as: 680 imperial gallons is equal to US dry barrels.
An approximate numerical result would be: six hundred and eighty imperial gallons is about twenty-six point seven three US dry barrels, or alternatively, a US dry barrel is about zero point zero four times six hundred and eighty imperial 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.