Challenge: fastest program wins

Write a program in your language that
1.opens a file as arbitrary precision integer.
2.divides the number by 3.
3.stores the binary result in another file.

>>88
No, every single program in this thread does not.

The two programs in this thread which actually do it properly and efficiently interpret >>1 to mean the file is read in as a binary number with the most significant bit at the start of the file and the least significant bit at the end.