C:\test>dir dna.txt
 Volume in drive C has no label.
 Volume Serial Number is 8C78-4B42

 Directory of C:\test

08/11/2010  16:35    12,831,000,000 dna.txt
               1 File(s) 12,831,000,000 bytes
               0 Dir(s)  281,938,862,080 bytes free

C:\test>perl -nE"}{say $." dna.txt
141000000