If you slept during the order of operations chapter in math class, here's how you do this with an example of a 60" 4K (3840x2160) screen:
Ọ bụrụ na ị na-arahụ ụra mgbe ị na-arụ ọrụ n'usoro ihe omume na mgbakọ na mwepụ, lee otú i si eme nke a na ihe atụ nke 60 "4K (3840x2160) ihuenyo: