05. Dance Hall - Simple Operations and Calculations

function danceHall(input) {
    let l = Number(input.shift());
    let w = Number(input.shift());
    let a = Number(input.shift());

    let hall = (l*100) * (w*100);
    let wardrobe = (a*100) * (a*100);
    let bench = hall / 10;
    let freeArea = hall - wardrobe - bench;
    let dancers = Math.floor(freeArea / (40 + 7000));

    console.log(dancers);


}