I was using a calculator app on my iPhone when I remembered the "8008135" Upside-Down thing people use to do in school. I tried it and this happened. Mind Blown : r/funny
8008135 Calculator Funny Retro Math Nerd
Microsoft: "Yo dude type 8008135 in ur calculator. Wanna be part of Pen 15 club?!?" | NeoGAF