this is cool~

Try it!!!

1) Key-in the first 3 digit of your hand-phone number (not the 01x number) into the calculator
2) Multiply by 80
3) Add 1
4) Multiply by 250
5) Plus last four digit of phone number
6) Plus last four digit of phone number again
7) Minus 250
8) Divide by 2 at last

Is it your hand-phone number????