How to convert 400 US customary teaspoons to US customary cups?
We know (by definition) that:
We can set up a proportion to solve for the number of US customary cups.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US customary cup is equal to 0.12 times 400 US customary teaspoons.
It can also be expressed as: 400 US customary teaspoons is equal to US customary cups.
An approximate numerical result would be: four hundred US customary teaspoons is about eight point three three US customary cups, or alternatively, a US customary cup is about zero times four hundred US customary teaspoons.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.