cool trick

Have a calculator handy:

1.  Enter the first 3 digits of your home phone # (not the area code);

2.  multiply by 80;

3.  add 1;

4.  multiply by 250;

5.  add the last 4 digits of your phone #;

6.  add the last 4 digits of your phone #- again;

7.  subtract by 250;

8.  divide by 2;

So, do you recognize the #?

Now tell me who's crazy enough to think this stuff up?