I assume GO has 4/5 gallon of water.
If you want to split it equally into 4 bottles, you should do 4/5 /4.
Now simplify.
4/5/4=1/5
1/5 Gallon
Divide both sides by 5
e^x=3.152 take the natural log of both sides...
x=ln(3.152)
x≈1.148
-300>100 that is the answer because its below sea level
9/15
6/10
12/20
15/25
18/30
Hope this helps!! :)