function numberOfSeats([arg1, arg2]) {
    let lenght=parseFloat(arg1);
    let width=parseFloat(arg2);
    let colons=parseFloat(((width-1)/0,7));
        colons=Math.trunc();
    let rows=parseFloat((lenght/1,2));
        rows=Math.trunc();
    let seats=parseFloat((colons*rows)-3);
console.log(seats);
}