1. Grab a calculator.
   (You won't be able to do this one in your head.)
2. Key in the first three digits of your phone number.
   (NOT the area code)
3. Multiply by 80.
4. Add one.
5. Multiply by 250.
6. Add the last four digits of your phone number.
7. Add the last four digits of your phone number again.
8. Subtract 250.
9. Divide number by two.

Do you recognize the answer?

Click HERE to see why this works.