21 dry gallons in dry quarts

Conversion formula
How to convert 21 dry gallons to dry quarts?

We know (by definition) that: $1\mathrm{drygallon}\approx 4\mathrm{dryquart}$

We can set up a proportion to solve for the number of dry quarts.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 21 ⁢ drygallon ≈ 84 ⁢ dryquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry quart is equal to 0.0119047619047619 times 21 dry gallons.

It can also be expressed as: 21 dry gallons is equal to $\frac{1}{\mathrm{0.0119047619047619}}$ dry quarts.

Approximation

An approximate numerical result would be: twenty-one dry gallons is about zero dry quarts, or alternatively, a dry quart is about zero point zero one times twenty-one dry gallons.