(1000 - 1) . (1000 - 2) . (1000 - 3) ... (1000 - 234567)
= (1000 - 1) . (1000 - 2) ... (1000 - 1000) ... (1000 - 234567)
= (1000 - 1) . (1000 - 2) ... 0 ... (1000 - 234567)
= 0
=(1000-1)....(100-1000)...(1000-234567)
=(1000-1)...0....(1000-1234567)
=0
de qua