oblicz jadziaaaaaaa: 6! ^8!_5! ^9!_6*7*8*9

fff: 6! = 1 * 2 * 3 * ... * 6 = 5! * 6 = 4! * 30 = 3! * 120 = 2! * 360 = 1! * 720 = 720

8!		5! * 6 * 7 * 8
	=		= 6 * 7 * 8 = ...
5!		5!

9!		5! * 6 * 7 * 8 * 9
	=		= 5! =
6 * 7 * 8 * 9		6 * 7 * 8 * 9

= 4! * 5 = 3! * 20 = 2! * 60 = 120