import java.util.Scanner;
import java.math.BigDecimal;
import java.math.BigInteger;
class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    BigDecimal A = scan.nextBigDecimal();
    BigDecimal B = scan.nextBigDecimal();
    BigDecimal ANS = new BigDecimal("1");
    ANS = A.multiply(B);
    BigDecimal ans = ANS.setScale(0, BigDecimal.ROUND_DOWN);
    System.out.println(ans);
  }
}

 import java.util.Scanner; Scanner java.util import java.math.BigDecimal; BigDecimal java.math import java.math.BigInteger; BigInteger java.math class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    BigDecimal A = scan.nextBigDecimal();
    BigDecimal B = scan.nextBigDecimal();
    BigDecimal ANS = new BigDecimal("1");
    ANS = A.multiply(B);
    BigDecimal ans = ANS.setScale(0, BigDecimal.ROUND_DOWN);
    System.out.println(ans);
  }
} Main public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    BigDecimal A = scan.nextBigDecimal();
    BigDecimal B = scan.nextBigDecimal();
    BigDecimal ANS = new BigDecimal("1");
    ANS = A.multiply(B);
    BigDecimal ans = ANS.setScale(0, BigDecimal.ROUND_DOWN);
    System.out.println(ans);
  } main {
    Scanner scan = new Scanner(System.in);
    BigDecimal A = scan.nextBigDecimal();
    BigDecimal B = scan.nextBigDecimal();
    BigDecimal ANS = new BigDecimal("1");
    ANS = A.multiply(B);
    BigDecimal ans = ANS.setScale(0, BigDecimal.ROUND_DOWN);
    System.out.println(ans);
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) BigDecimal A = scan.nextBigDecimal(); A scan.nextBigDecimal() scan.nextBigDecimal scan BigDecimal B = scan.nextBigDecimal(); B scan.nextBigDecimal() scan.nextBigDecimal scan BigDecimal ANS = new BigDecimal("1"); ANS new BigDecimal("1") ANS = A.multiply(B) ANS A.multiply(B) A.multiply A B BigDecimal ans = ANS.setScale(0, BigDecimal.ROUND_DOWN); ans ANS.setScale(0, BigDecimal.ROUND_DOWN) ANS.setScale ANS 0 BigDecimal.ROUND_DOWN BigDecimal BigDecimal.ROUND_DOWN System.out.println(ans) System.out.println System.out System System.out ans String[] args args
import java.util.Scanner;
import java.math.BigDecimal;
import java.math.BigInteger;
class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    BigDecimal A = scan.nextBigDecimal();
    BigDecimal B = scan.nextBigDecimal();
    BigDecimal ANS = new BigDecimal("1");
    ANS = A.multiply(B);
    BigDecimal ans = ANS.setScale(0, BigDecimal.ROUND_DOWN);
    System.out.println(ans);
  }
}


