import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
	    String s[]=br.readLine().split(" ");
      	int a=Integer.parseInt(s[0]);
		float b=Float.parseFloat(s[1]);
      	System.out.printf("%.0f",a*b);
      System.out.println();

    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz