Short Program for Numerology

I want a tiny program where you can enter your date of birth and the program will spit out a number. The purpose of this is numerology: you enter your date of birth and the program delivers/identifies what number you are. It's similar to astrology: based on your DOB we know what horoscope you are. Same in numerology: you have a number personality based on your date of birth. I want to embed this in my Kajabi website to help my customer know what their number personality is so they can purchase the correct forecast for themselves. I do not have a page setup for this yet because I need to understand the requirement of this small program first. I might want to embed this in a standalone website in the future. And if this works, we might develop it into something a bit more sophisticated, but this is the key first step. Please let me know if you have questions. Thank you.