Ok kiddo, have you ever played with a puzzle where you have to put shapes together to make a bigger shape? Well, the Birkhoff algorithm is kind of like that, but with numbers.
When we have a bunch of numbers, we can use the Birkhoff algorithm to find the best way to put those numbers together to make a bigger number. Just like how you try different ways to put puzzle pieces together until they fit just right.
The Birkhoff algorithm is named after a man named Garrett Birkhoff who figured out this neat trick. It works by taking the original numbers and arranging them in a special way called a matrix. Don't worry too much about what a matrix is, it's just a big table with numbers inside.
Then the Birkhoff algorithm will look at all the possible ways to add up the numbers in the matrix to make the biggest number possible. It's like trying all the different ways to fit puzzle pieces together to see which one makes the best picture.
Once the Birkhoff algorithm figures out the best way to add up the numbers, it will give us the answer. And that's it, we have a bigger number made from the original smaller numbers thanks to the Birkhoff algorithm!