function pokrivki(amount,length,width){
    let pokrivki = amount * ((length + 0.6) * (width + 0.6));
    let kareta = amount * Math.pow(length / 2, 2);

    let pokrivkiprice = pokrivki * 7;
    let karetaprice = kareta * 9;

    let sumausd = (pokrivkiprice + karetaprice).toFixed(2);
    let sumabgn = ((pokrivkiprice + karetaprice)*1.85).toFixed(2);

    console.log(`${sumausd} USD`);
    console.log(`${sumabgn} BGN`)
}
pokrivki(5, 1.00, 0.50);