import java.util.Scanner;

public class SimpleMoney {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        //•	1 биткойн = 1168 лева.
        //•	1 китайски юан = 0.15 долара.
        //•	1 долар = 1.76 лева.
        //•	1 евро = 1.95 лева.


        double bitcoinsCount =Double.parseDouble(scanner.nextLine());
        double chinesejuanCount = Double.parseDouble(scanner.nextLine());
        double commission = Double.parseDouble(scanner.nextLine());

        double bitcoinsLeva = bitcoinsCount * 1168;
        double chinesejuanDollars = chinesejuanCount * 0.15;
        double chinesejuanLeva = chinesejuanDollars * 1.76;
        double allEuro = (bitcoinsLeva + chinesejuanLeva) /1.95 ;

        double moneyPlusCommission = allEuro * commission /100;
        double moneyFinal = allEuro - moneyPlusCommission;

        System.out.printf("%.2f",moneyFinal);



    }
}