Are you wondering how this works out for any phone number? Take a look
at the steps below. Assume the first three digits of your phone number
are designated 'x' and the last four digits are designated 'y'.
1. Grab a calculator
2. Key in the first three digits of your phone number (NOT the area code)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again
8. Subtract 250
9. Divide number by 2
Say 'x' for the number formed from the first three digits and 'y' for
the number formed from the last three digits (eg, using The Tutoring Center phone number of 3835654, x=383, y=5654).
Now, your phone number is 10000x+y, agreed (eg, (383*10000) + 5654 = 3835654)
What you're calculating looks like this, step by step
Expanding after step 7 you have got
Now, subtract 250 to get
Divide by 2 to get
which we agreed up above is your phone number.