421 imperial gallons in US customary cups

Conversion formula
How to convert 421 imperial gallons to US customary cups?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 19.2151988080777\mathrm{uscup}$

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

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

Conclusion: 421 ⁢ imperialgallon ≈ 8089.5986982007125 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.000123615526221643 times 421 imperial gallons.

It can also be expressed as: 421 imperial gallons is equal to $\frac{1}{\mathrm{0.000123615526221643}}$ US customary cups.

Approximation

An approximate numerical result would be: four hundred and twenty-one imperial gallons is about eight thousand and eighty-nine point six zero US customary cups, or alternatively, a US customary cup is about zero times four hundred and twenty-one imperial gallons.