He ' s fringe top 5 , I rotate between him and AD depending on which one of them is hurt <| sep |> It ' s a visualization of the matrix multiplication algorithm . It could be a useful visual aid for students to execute the procedure correctly , especially when multiplying two square matrices . It ' s been too long for me to even remember my experience learning that stuff , but I can imagine someone who just recently did it in class sitting down with their homework and thinking something like okay row A 1 by column B 1 . or is it column A 1 by row B 1 ? Shit . Okay let ' s just try row A 1 by column B 1 , and that goes in the top left corner , and now . Row A 2 by column B 2 ? no wait that doesn ' t make sense . fuuuuuckkkkkkk can I still drop this class ? ? My point is the image of rotating the second matrix and then dragging it down through the first say a lot more in fewer words