You haven't provided enough information - what are the units of measurement (24 whats, feet, metres) and how deep is the pool...?
Cannot be answered with only these measurements. You need to specify what shape the pool is. Also, for a rectangular pool, the length, width and depth are needed. For a round pool, the diameter and depth are needed.
Is the pool a circle? Do you want US gallons, or Imperial gallons?
A pool of this size can hold up to about 11,970 gallons of water.
A pool this size can hold up to about 5,250 gallons of water.
How many gallons of water for a 15'x30' swimming pool?
This pool can hold a maximum of about 5,707.6 gallons of water.
This pool, when filled with 4.5 feet of water, will contain about 15,300 gallons of water.
This pool can hold up to about 15,148 gallons of water. (this would fill the pool to the very top).
A 16-foot by 32-foot by 4-foot pool can hold up to about 15,320 gallons of water.
This pool (6'x4'x2') can hold up to 360 (359.065) gallons water.
This pool can hold a maximum of about 9,403 gallons of water.