#include<iostream>
using namespace std;
int main()
{
	string a, b;
	int res[4001] = { 0 }, n1[2001] = { 0 }, n2[2001] = {0};
	cin >> a >> b;
	for (int i = a.length()-1,j=2000; i>=0; i--,j--)
	{
		n1[j] = a[i]-'0';
	}
	for (int i = b.length() - 1, j = 2000; i >= 0; i--, j--)
	{
		n2[j] = b[i]-'0';
	}
	for (int i = 2000; i>=0 ; i--)
	{
		for (int j = 2000; i>=0; j--)
		{
			res[i + j] += (n1[i] * n2[j]);
			if (res[i + j] >= 10)
			{
				res[i + j - 1] = res[i + j] / 10;
				res[i + j] %= 10;
			}
		}
	}
	int weishu;
	for (int i = 0;; i++)
	{
		if (res[i] != 0)
		{
			weishu = i;
			break;
		}
	}
	if (res[weishu] >= 10)
	{
		res[weishu - 1] = res[weishu] / 10;
		res[weishu] %= 10;
	}
	for (int i = 0;; i++)
	{
		if (res[i] != 0)
		{
			weishu = i;
			break;
		}
	}
	for (int i = weishu; i <= 4000; i++)
	{
		cout << res[i];
	}
	return 0;
}