#include <iostream>
#include <string>

using namespace std;

const int N = 100010;

string a, b;
int A[N], B[N], C[N];
int la, lb;

int main()
{
    cin >> a >> b;
    for (int i = a.size() - 1; i >= 0; i -- ) A[la ++] = a[i] - '0';
    for (int i = b.size() - 1; i >= 0; i -- ) B[lb ++] = b[i] - '0';
    int len = la + lb;
    for (int i = 0; i < la; i ++ )
    {
        for (int j = 0; j < lb; j ++ )
        {
            C[i + j] += A[i] * B[j];
            C[i + j + 1] += C[i + j] / 10;
            C[i + j] %= 10;
        }
    }
    while (len > 1 && C[len - 1] == 0) len --;
    for (int i = len - 1; i >= 0; i --) cout << C[i];
    return 0;
}