function dancingRoom(input) {
    // Variables
    let roomLength = Number(input.shift()) * 100;
    let roomWidth = Number(input.shift()) * 100;
    let garderobe = Math.pow(Number(input.shift() * 100), 2);
    let roomArea = roomLength * roomWidth;
    let bench = roomArea / 10;
    let freeSpace = roomArea - garderobe - bench;
    let dancers = freeSpace / (40 + 7000);

    // console.log(roomArea);
    // console.log(garderobe);
    // console.log(bench);
    // console.log(freeSpace);
    console.log(Math.floor(dancers));

}

dancingRoom([
    50,
    25,
    2,
])