100*1/2*2/3*3/*4/5*5/6.*999/1000

100*1/2*2/3*3/*4/5*5/6.*999/1000

100*1/2*2/3*3/*4/5*5/6.*999/1000
=100*(1/2*2/3*3/*4/5*5/6.*999/1000)
=100*1/1000
=1/10