What is the total population for all the districts that have an area larger tahn the average city area?
return cities ;return areas of #1 ;return the  average of #2 ;return districts ;return areas of #4 ;return #4 where #5 is higher than #3 ;return populations of #6 ;return sum of #7
['select', 'project', 'aggregate', 'select', 'project', 'comparative', 'project', 'aggregate']