As is good practice for apprenticing scientists, we plan to check the repeatability of experiments using Joule's crude calorimeter, wherein water was mixed by a rotating paddle connected via pulley to a falling weight. If the volume of the water remains constant during the experiment, what is the maximum amount of work done on the water if a 22.4 kg mass falls 6 times from a height of 1.0 m? Report your answer with units of kJ.