This is an 8-Bit Carry Look Ahead calculator. In order to use this calculator, you must input the two numbers that you would like to add into the left two columns. You do this by pressing the buttons on each column. I labeled all of the inputs and outputs to make it easier to use. If you do not understand what I just said, you should just tinker around with the calculator and you will eventually understand. The sum of your two inputs is represented on the column to the very right. If you are confused what CIN means, it stands for "carry in" which essentially just adds one to the total number. It is capable of adding numbers of up to 255 and getting a sum of up to 511. If you are interested in learning more about CLA's, then I highly suggest watching a video on them. I personally find them very interesting.
This project is of an 8-Bit CLA. I made it exactly as you would make it it real life, mainly from logic gates. Enjoy!