If (a,b)ε(0,1), then:

a/b
=               _________________
0.a1a2.........anb1b2...........bm
    Preperiod      Period

Determine the respective lengths of the preperiod and the postperiod of (10!)^-1

*** Computer program/excel solver methodologies are welcome, but a semi-analytic (hand calculator and p&p) methodology is preferred.