import java.util.Scanner;

public class Test {
	public static Scanner sc = new Scanner(System.in);

	public static void main(String[] args) {
		double v = sc.nextDouble();
		int t = sc.nextInt(), v2;
		v *= 10000;
		v += 0.1;
		v2 = (int)v;
		System.out.println(v2*t/10000);

	}
}