How many gallons of water will fit in a 72 square inches x 24 square inches x 29.5 square inch tank?

For Feet, Formula = L x W x H x 7.5

Covert to feet dimensions

72" = 6'

30" = 2.5'

24" =2'

So plug them into the formula

6' x 2.5' x 2' x 7.5

225

So the aquarium is 225 Gallons!