How to convert 421 US quarts to metric teaspoons?
We know (by definition) that:
We can set up a proportion to solve for the number of metric teaspoons.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 metric teaspoon is equal to 1.25497412046626e-05 times 421 US quarts.
It can also be expressed as: 421 US quarts is equal to metric teaspoons.
An approximate numerical result would be: four hundred and twenty-one US quarts is about seventy-nine thousand, six hundred and eighty-two point nine one metric teaspoons, or alternatively, a metric teaspoon is about zero times four hundred and twenty-one US quarts.
 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.