Press the Green Flag then click the Scratch Cat. The cat will ask you for a math question. Right now it is limited to 2 digit numbers, and the +, -, *, and / operations. You can just write " 34 - 12" or even ask "What is 34 - 12 ?" be sure to add spaces before and after any numbers, or the parsing won't work!
My "questions" turned into math questions, but I built a working parser to identify two numbers (up to two digits) and the operator. I have to think that there is a better way to pull out the numbers, and make it so they can be n digits, that isn't just expanding out the brute-force method I used. Another project.