1. Key in the first 3 digits of your phone number into a calculator. (not your area code, but your phone number)
2. Multiply that number by 80.
3. Add 1.
4. Multiply by 250.
5. Add the last 4 digits of your phone number.
6. Add the last 4 digits of your phone number again.
7. Subtract 250.
8. Divide by 2.