Originally Posted by PornMD

#4 before #5 = Add 250. #8 cancels it out.
#3 and #5 = Multiply by 20,000. #9 makes it 10,000
#6 & #7 is simply adding your last 4 digits into it twice, #9 makes it once.

So this miracle function to get your phone number is:

1. Key in first 3 digits of your phone number
2. Multiply by 10,000
3. Add the last 4 digits of your phone number.