I had just got it in my Orkut’s Scrapbook:
Just follow the procedure and you will end up with your phone number which must be 7 digit to make it work;

1. Key in the first three digits of your phone number into a calculator. (do not use your area code number)
2. Multiply by 80
3. Add one
4. Multiply by 250
5. Plus last four digits of your phone numbe.
6. Plus last four digits of your phone number again.
7. Minus 250.
8. Divide by 2.

Whats result??
Is it your phone number?