How to convert 689 deciliters to US gallons?
We know (by definition) that:
We can set up a proportion to solve for the number of US gallons.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US gallon is equal to 0.0549406644992743 times 689 deciliters.
It can also be expressed as: 689 deciliters is equal to US gallons.
An approximate numerical result would be: six hundred and eighty-nine deciliters is about eighteen point one nine US gallons, or alternatively, a US gallon is about zero point zero five times six hundred and eighty-nine deciliters.
 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.