664 imperial gallons in US customary teaspoons

Conversion formula
How to convert 664 imperial gallons to US customary teaspoons?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 922.329542787729\mathrm{usteaspoon}$

We can set up a proportion to solve for the number of US customary teaspoons.

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

Conclusion: 664 ⁢ imperialgallon ≈ 612426.816411052 ⁢ usteaspoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary teaspoon is equal to 1.63284815949146e-06 times 664 imperial gallons.

It can also be expressed as: 664 imperial gallons is equal to $\frac{1}{\mathrm{1.63284815949146e-06}}$ US customary teaspoons.

Approximation

An approximate numerical result would be: six hundred and sixty-four imperial gallons is about six hundred and twelve thousand, four hundred and twenty-six point eight one US customary teaspoons, or alternatively, a US customary teaspoon is about zero times six hundred and sixty-four imperial gallons.