A prototype tidal energy harvester converts kinetic energy from ocean currents into electrical energy.
The moving water delivers a total of 22500 kJ of kinetic energy to the harvester's turbine blades every 1.25 minutes1.25\text{ minutes}1.25 minutes.
The overall efficiency of the harvester in converting this kinetic energy into electrical power is 0.32 (32%).
Calculate the useful electrical power output of the harvester.
Give your answer in kW.