210 metric teaspoons in dry gallons
Result
The conversion result is: 210 metric teaspoons is equivalent to 0.238371783370575 dry gallons.[1]
Conversion formula
How to convert 210 metric teaspoons to dry gallons?
We know (by definition) that: 1 brteaspoon ≈ 0.00113510373033607 drygallon.
We can set up a proportion to solve for the number of dry gallons.
1 brteaspoon / 210 brteaspoon ≈ 0.00113510373033607 drygallon / x drygallon
Now, we cross multiply to solve for our unknown x:
x drygallon ≈ (210 brteaspoon / 1 brteaspoon) * 0.00113510373033607 drygallon → x drygallon ≈ 0.23837178337057469 drygallon
Conclusion:
210 brteaspoon ≈ 0.23837178337057469 drygallon

Conversion in the opposite direction
The inverse of the conversion factor is that 1 dry gallon is equal to 4.19512740081905 times 210 metric teaspoons.
It can also be expressed as: 210 metric teaspoons is equal to 1 / 4.19512740081905 dry gallons.
Approximation
An approximate numerical result would be: two hundred and ten metric teaspoons is about zero point two four dry gallons, or alternatively, a dry gallon is about four point two zero times two hundred and ten metric teaspoons.
Footnotes
[1] 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.