#include <bits/stdc++.h>

using namespace std;

/**
 * 功能：高精度乘低精度模板
 * @param A
 * @param b
 * @return
 */
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);
        t /= 10;
    }
    while (C.size() > 1 && C.back() == 0) C.pop_back();
    return C;
}

int main() {
    string a;
    int b;
    vector<int> A, C;
    cin >> a >> b;
    //倒着放的噢~
    for (int i = a.size() - 1; i >= 0; i--) A.push_back(a[i] - '0');
    C = mul(A, b);
    //倒着输出噢~
    for (int i = C.size() - 1; i >= 0; i--) printf("%d", C[i]);
    return 0;
}