Before you start to calculate 109 Gallons, you should know the conversion rate between Gallons and Cup.
The rate is 19.252 and the math equation is 109 X 19.252 = 2098.468 .
Quick conversion chart of Gallons to Cups
1 Gallon to Cup = 19.252 Cup5 Gallon to Cup = 96.26 Cup10 Gallon to Cup = 192.52 Cup20 Gallon to Cup = 385.04 Cup30 Gallon to Cup = 577.56 Cup40 Gallon to Cup = 770.08 Cup50 Gallon to Cup = 962.6 Cup75 Gallon to Cup = 1443.9 Cup100 Gallon to Cup = 1925.2 Cup