#include <iostream>
#include <vector>

using namespace std;

vector<int> mul(vector<int> A, int b)
{
    vector<int> C;

    int t = 0; // 需要一个为零的进位
    for(int i = 0; i < A.size() || t; i ++ ) // || t能把所有进位都处理掉
    {
        if (i < A.size()) t += A[i] * b;
        C.push_back(t % 10);
        t /= 10;
    }

    while (C.size() > 1 && C.back() == 0) C.pop_back(); // 去掉前导零 
    return C;
}

int main()
{
    string a;
    vector<int> A;
    int b;
    cin >> a >> b;
    for (int i = a.size() - 1; i >= 0; i -- ) A.push_back(a[i] - '0');

    auto C = mul(A, b);

    for (int i = C.size() - 1; i >= 0; i -- ) printf("%d",C[i]);

    return 0;
}