How to convert 217 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 3.48885878709677 times 217 metric teaspoons.
It can also be expressed as: 217 metric teaspoons is equal to US gallons.
An approximate numerical result would be: two hundred and seventeen metric teaspoons is about zero point two eight US gallons, or alternatively, a US gallon is about three point four nine times two hundred and seventeen 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.