Find the total population of the districts where the area is bigger than 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  bigger than  #3 ;return the   populations of #6 ;return the   sum of #7
['select', 'project', 'aggregate', 'select', 'project', 'comparative', 'project', 'aggregate']