Basicly this is a problem that i saw on youtube that sais: "For every chessboard square, you are going to multiply amount of rice grains by 2. That means, that if in the first square you have 1 grain in the first square, in the second you have 2, in the third square you have 4 and in the fourth one you have 8. That, repeated all over the chessboard. If 15384 grains of rice equals 1kg, then what is the amount of kilograms that are in the chessboard?" My first thought for calculating the amount of rices, was by doing it manualy. But then I realized that way too ineficient. So then I thought that if I want to express that in mathematical lenguage, it was 2 by the power of 63, wich is a very big nimber that it's not advisable to do manually. So I made a code (it is inside) and make the count on a list. Then, I had to add all those numbers and then divide it by 15384 (the amount of grains that is equivalent to 1kg) This was very fun to make :D