Freaky

This is crazy, but it's fun...

1. Multiply the first three digits of your phone number (not your area code) by 80.
2. Add 1.
3. Multiply by 250.
4. Add the number formed by the last four digits of your phone number.
5. Add that four-digit number again.
6. Subtract 250.
7. Divide by 2.

What number did you get?

Freaky...