//简单大数相乘,用java很简单
import java.util.Scanner;
import java.math.BigInteger;
public class Main{
public static void main(String[] args){
Scanner in = new Scanner(System.in);
BigInteger a,b;
while(in.hasNext()){
a = in.nextBigInteger();
b = in.nextBigInteger();
System.out.println(a.multiply(b));
}
}
}