(23,79:7,8-6,8 :17)×3,04-2,04×0,85
(23,79:7,8-6,8:17)*3,04-2,04*0,85 = 6,322 23,79:7,8= 3,05 6,8:17= 0,4 3,05-0,4=2,65 2,65*3,04=8,056 2,04*0,85= 1,734 8,056-1,734=6,322
(3,05-0,4)*3,04-1,734=2,65*3,04-1,734=8,056-1,734=6,322