import java.io.*;
import java.util.*;

public class Main{
    public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    }
} import java.io.*; io.* java import java.util.*; util.* java public class Main{
    public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    }
} Main public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    } main {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String temp[] = br.readLine().split(" "); temp br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " long n = Long.parseLong(temp[0]); n Long.parseLong(temp[0]) Long.parseLong Long temp[0] temp 0 double y = Double.parseDouble(temp[1]); y Double.parseDouble(temp[1]) Double.parseDouble Double temp[1] temp 1 double temp2 = y*(double)(n); temp2 y*(double)(n) y (double)(n) System.out.println((long)temp2) System.out.println System.out System System.out (long)temp2 String [] args args public class Main{
    public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    }
} public class Main{
    public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    }
} Main
import java.io.*;
import java.util.*;

public class Main{
    public static void main(String [] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String temp[] = br.readLine().split(" ");
        
        long n = Long.parseLong(temp[0]);
        double y = Double.parseDouble(temp[1]);

        double temp2 = y*(double)(n);



        System.out.println((long)temp2);
       

    }
}