A couple of Japanese math enthusiasts recently spent 24 hours covering the walls of an entire room with calculations in an attempt to find the ultimate answer to the ‘1+1’ formula.

It’s widely regarded as the easiest mathematical formula, but ‘1+1’ isn’t as simple as it appears. Well, at least not to math purists looking to apply multiple fields of mathematics while tackling this deceptively simple calculation. Popular YouTubers and math enthusiasts Hanao and Dengan recently proved this by spending a whopping 24 hours and covering the walls and floor of an entire room with calculations in one of their most intriguing projects yet.