First you would find what three quarters of 2 is since the volume of the pool is 2 meters. 2 * 3/4 (three quarters) is 1.5, meaning there are 1.5 meters of water in the pool.
Then you would convert 1.5 meters to liters, which comes out to 1500 liters.
(You said little of water in the question but I'm assuming you meant liters so correct me if I'm wrong.)
