Number fon!

Key-in the first 3 digit of your handphone number(not the network 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 handphone number???? (^_^)" hehe..