The number of ways of seven digit number...

The number of ways of seven digit number with distinct digits of the form `a_(1)a_(2)a_(3)a_(4)a_(5)a_(6)a_(7),(a_9(i)!=0AAi=1,2,.7)` be present in decimal system such that `a_(1)lta_(2)lta_(3)lta_(4)gta_(5)gta_(6)gta_(7)`

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