#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<vector>
#include<string>
using namespace std;

vector<int> mul(vector<int>& A, int b)//˷
{
    vector<int> C;
    int t = 0;
    for (int i = 0; i < A.size() || t; i++)
    {
        if (i < A.size()) t += A[i] * b;
        C.push_back(t % 10);//λ
        t /= 10;
    }
    while (C.size() > 1 && C.back() == 0) C.pop_back();//ȥȵ0

    return C;
}
int main()
{
    string a;
    int b;
    cin >> a >> b;

    vector<int> A;
    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;
}