According to Google:
1 liter = 0.264172051 US gallons
1 U.S. dollar = 2.34990013 Brazil reais
... which seems to be correct.
2.09 reais a liter, than
2.09 - 0.26417
x - 1
2.09 = 0.26417x
2.09/0.26417 = x
7.91 reais a gallon
Now let's turn reais into dollars:
7.91/2.349 =~ 3.37 dollars
So it's 3.37 dollars a gallon.
So it's the incredibly expensive value of 3.37 dollars per gallon. Which makes me want to sell that freaking car and start riding a bike to work and other places... It mght sound like we have the same gas prices as you guys do, but the thing is, stuff here are usually way cheaper (except gas and electronics), and to compensate that sallaries are lower. So it's not a good comparison, because iet's way more expensive for us than to you guys over there.