#include<iostream>
#include<vector>
#include<string>
using namespace std;
string a, b;
vector<int> mul(vector<int> A, vector<int> B)
{
	int num = a.size() + b.size() - 1;
	vector<int> C(num+1);
	for (int i = 0; i < num; i++)
	{
		for (int j = 0; j <= i; j++)
		{
			C[i] += A[j] * B[i - j];
		}
		if (C[i] >= 10)
		{
			C[i + 1] += C[i] / 10;
			C[i] %= 10;
		}
	}
	while (C.back() == 0)
		C.pop_back();
	return C;
}
int main()
{
	cin >> a;
	cin >> b;
	vector<int> A;
	vector<int> B;
	for (int i = a.size() - 1; i--; i >= 0)
		A.push_back(a[i]-'0');
	for (int i = b.size() - 1; i--; i >= 0)
		B.push_back(b[i]-'0');
	for (int i = A.size(); i < a.size() + b.size() - 1; i++)
		A.push_back(0);
	for (int i = B.size(); i < a.size() + b.size() - 1; i++)
		B.push_back(0);
	auto C = mul(A, B);
	for (int i = C.size() - 1; i--; i >= 0)
		cout << C[i];
	return 0;
}