import java.util.Scanner;
public class Hello {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
String s1,s2;
s1=sc.next();
s2=sc.next();
String s=mul(s1,s2);
System.out.println(s);
}
public static String mul(String num1,String num2) {
num1=reverseString(num1);
num2=reverseString(num2);
StringBuilder res=new StringBuilder();
int carry=0; //carry表示进位
int N1=num1.length();
int N2=num2.length();
int i=0,p=0,q=0;
for(;i<(N1+N2-1);i++)
{
int sum=0;
int i1=0;
for(;i1<N1;i1++)
{
int i2=0;
for(;i2<N2;i2++)
{
if((i1+i2)==i)
{
p=charToInt(num1.charAt(i1));
q=charToInt(num2.charAt(i2));
sum=sum+p*q;
}
}
}
int r=(sum+carry)%10;
carry=(sum+carry)/10;
res.append(r);
}
if(carry!=0)
res.append(carry);
return removeHeadZero(res.reverse().toString());
}
static String reverseString(String ori) {
StringBuilder reversed=new StringBuilder(ori);
reversed.reverse();//字符反转
return reversed.toString();
}
static int charToInt(char ch) {
int value=(int)ch-‘0’;
return value;
}
static String removeHeadZero(String str) {
StringBuilder s = new StringBuilder(str);
for (int i = 0; i<str.length()-1; i++) {
if(str.charAt(i)==’0′)
s.deleteCharAt(0);
else break;
}
return s.toString();
}
}
