This is a actually a great trick you can do with your iPhones calculator app.. While you're pulling your phone out I grab a piece of paper and write a prediction on it and leave this. I tell you we need some random numbers to multiply together.
It doesn't require any embarrassing pick-up lines. Anyone can do it, and all you need is simple math and your phone's calculator.
Find a calculator. Insert in the first three digits of your phone number (not the area code) Example : (905) 567 – 1111. Multiply these three numbers by 80