How to convert 398 metric teaspoons to US gallons?
We know (by definition) that:
We can set up a proportion to solve for the number of US gallons.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US gallon is equal to 1.90221697688442 times 398 metric teaspoons.
It can also be expressed as: 398 metric teaspoons is equal to US gallons.
An approximate numerical result would be: three hundred and ninety-eight metric teaspoons is about zero point five three US gallons, or alternatively, a US gallon is about one point eight nine times three hundred and ninety-eight metric 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.