640 imperial cups in US customary teaspoons

Conversion formula
How to convert 640 imperial cups to US customary teaspoons?

We know (by definition) that: $1\mathrm{brcup}\approx 57.645596424233\mathrm{usteaspoon}$

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: 640 ⁢ brcup ≈ 36893.18171150912 ⁢ usteaspoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary teaspoon is equal to 2.71052794475582e-05 times 640 imperial cups.

It can also be expressed as: 640 imperial cups is equal to $\frac{1}{\mathrm{2.71052794475582e-05}}$ US customary teaspoons.

Approximation

An approximate numerical result would be: six hundred and forty imperial cups is about thirty-six thousand, eight hundred and ninety-three point one eight US customary teaspoons, or alternatively, a US customary teaspoon is about zero times six hundred and forty imperial cups.