define _CRT_SECURE_NO_WARNI NGS include fstream include iostream inclu

#define _CRT_SECURE_NO_WARNINGS
#include <fstream>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <iomanip>
#include <string>
#include <vector>

using namespace std;
string perest(string s)
{
	for (int i = 0; i<(s.length() / 2); i++) {
	   char tmp = s[i];
	   s[i] = s[s.length()- i - 1];
	   s[s.length()-i-1] = tmp;
	}
	return s;
}
string sum (string str1, string str2)
{
	str1 = perest(str1);
	str2 = perest(str2);
	if (str1.length() > str2.length())
	{
		for (int i = str2.length(); i<str1.length();i++)
			str2 = str2 + '0';
	}
	else 
	{
		for (int i = str1.length(); i<str2.length();i++)
			str1 = str1 + '0';
	}
	
	std::string str;
	int n = str1.length();
	for (int i = 0; i < n; i++)
		str = str + "0";
	int a = 0;
	int b;
	for (int i = 0; i < n; i++)
	{
		a = a + str1[i] - '0';
		b = str2[i] - '0';
		if ((a + b) < 10)
		{
			str[i] = '0' + a + b;
			a = 0;
		}
		else
		{
			str[i] = '0' + a + b - 10; 
			a = 1; 
		}
	}
	if (a==1)
	{str = str + '1';}
	str = perest(str);
	return str;
}
string mul (string strx, string stry)
{	std::string str2;
	//std::string strx;
	//std::string stry;
	std::string str;
	stry = perest(stry);
	strx = perest(strx);
	

	for (int q=0; q<stry.length(); q++)
	{
	std::string str1="";
	for (int i = 0; i <strx.length(); i++)
		str1 = str1 + "0";
	int d = stry[q]-'0';
	int c=0;
	for (int i=0;i<strx.length(); i++)
	{
		int a = strx[i]-'0';
		if (a*d+c<10)
		{
			str1[i] = a*d+'0'+c;
			c = 0;
		}
		else {
			
			str1[i]=(((a*d)+c) % 10)+'0';
			c = ((a*d)+c)/10;

		}
	}
	char tyu = '0'+c;
	if (c>0) str1 =str1+ tyu;
	str1 = perest(str1);
	for (int u = 0; u<q;u++)
		str1= str1+'0';

	str1 = perest(str1);
	str2 = perest(str2);
	if (str1.length() > str2.length())
	{
		for (int i = str2.length(); i<str1.length();i++)
			str2 = str2 + '0';
	}
	else 
	{
		for (int i = str1.length(); i<str2.length();i++)
			str1 = str1 + '0';
	}
	
	
	int n = str1.length();
	for (int i = 0; i < n; i++)
		str = str + "0";
	int a = 0;
	int b;
	for (int i = 0; i < n; i++)
	{
		a = a + str1[i] - '0';
		b = str2[i] - '0';
		if ((a + b) < 10)
		{
			str[i] = '0' + a + b;
			a = 0;
		}
		else
		{
			str[i] = '0' + a + b - 10; 
			a = 1; 
		}
	}
	if (a==1)
	{str = str + '1';}
	str = perest(str);
	str2 = str;
	}
	std::string otvet;
	int bcd = 0;
	for (int i=0; i<str.length(); i++)
	{
		if (str[i] != '0' || bcd == 1 )
			{otvet = otvet+str[i];
		bcd = 1;}
	}
	if (otvet=="")
		otvet = "0";
	return otvet;
}
int main() {
	freopen ("input.txt","r",stdin);
	freopen ("output.txt","w",stdout);
	std::string str1;
	std::string str2;
	std::string str;
	cin >> str1;
	cin >> str2;
	str = mul (str1,str2);
	cout << str <<endl;
	//cin >> str;
	return 0;
}