421 US customary cups in US customary teaspoons

Conversion formula
How to convert 421 US customary cups to US customary teaspoons?

We know (by definition) that: $1\mathrm{uscup}\approx 48\mathrm{usteaspoon}$

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: 421 ⁢ uscup ≈ 20208 ⁢ usteaspoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary teaspoon is equal to 4.94853523357086e-05 times 421 US customary cups.

It can also be expressed as: 421 US customary cups is equal to $\frac{1}{\mathrm{4.94853523357086e-05}}$ US customary teaspoons.

Approximation

An approximate numerical result would be: four hundred and twenty-one US customary cups is about twenty thousand, two hundred and eight US customary teaspoons, or alternatively, a US customary teaspoon is about zero times four hundred and twenty-one US customary cups.