Maths Game with Numbers

Hello Guys, I have a game here, which requires simple part of your brain to solve. So, give it a try...

1. Grab a calculator. (You won't be able to do this one in your head)

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

We take for example, one's phone number is (012-457-5545), Then, the first three digits will be 457, while the last four digits will be 5545.

Try it on. Do you recognize the answer?

Note: I will discuss its mathematical aspect in the next post. Until then!