import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;

import static java.lang.System.in;

public class No350 {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));

        String[] inputs = reader.readLine().split(" ");
        double v = Double.parseDouble(inputs[0]);
        int t = Integer.parseInt(inputs[1]);

        System.out.println(solve(v, t));
    }

    public static int solve(double v, int t) {

        return BigDecimal.valueOf(v).multiply(BigDecimal.valueOf(t)).intValue();
    }
}