//
// Created by wangliewei on 2021/8/13.
//

#include<iostream>
#include<vector>
using namespace std;

vector<int> multi(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(); //比如答案是003，那么要去掉前面的0
    return C;
}


int main(){

    string a;//因为a很长，就用字符串表示
    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 = multi(A, b);

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

    return 0;
}