HTML ):- <! DOCTYPE html > < head > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" /> < link href = "https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@500&display=swap" rel = "stylesheet" /> < title >SkyCodingLab - Calculator</ title > < link rel = "stylesheet" href = "style.css" /> </ head > < body > < div class = "calculator" > < div class = "display" > < input type = "text" placeholder = "0" id = "input" disabled /> </ div > < div class = "buttons" > < input type = "button" value = "AC" id = "clear" /> < input type = "button" value = "DEL" id = "erase" /> < inpu