import java.util.Scanner;

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

        Double height = Double.parseDouble(scan.nextLine());
        Double weight = Double.parseDouble(scan.nextLine());

        Double heightincm = height * 100;
        Double weightincm = weight * 100;

        Double rows = Math.floor(heightincm / 120.0);
        Double clearweight = weightincm - 100;
        Double desks = Math.floor(clearweight / 70.0);

        Double places = (rows * desks) - 3;
        System.out.println(places);
    }
}