How to convert 407 imperial quarts 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 0.00818353007006377 times 407 imperial quarts.
It can also be expressed as: 407 imperial quarts is equal to US gallons.
An approximate numerical result would be: four hundred and seven imperial quarts is about one hundred and twenty-two point two zero US gallons, or alternatively, a US gallon is about zero point zero one times four hundred and seven imperial quarts.
 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.