8-Digit Command Block Calculator

This Calculator will add, subtract, multiply and divide whole numbers up to Minecraft's limit of 2,147,483,647, and display the last 8 digits. This means that you may start getting some answers that seem wrong if you use numbers above 8 Digits in size. Also, the +/- button only works once a number has been inputted. If I find a response claiming that the calculator doesn't work and it's because of one of these two issues I WILL respond will "AAAAAAAAAAAAAAAAAAAArhrjgjrhkgzlle".
Thank you.