Question 1208102
This was done already, yesterday!
You can look for the conversion factor for liters to gallons and use it.


Now it's been about two days.  Go back to that.  My answer gave fewer significant figures.  If you wanted to keep all of them, then you would have  129.6 liters in 30 days.  As for using gallons, a quick ref to online shows  1 liter is 0.264172 gallons.