//二次复习打卡

#include<bits/stdc++.h>
using namespace std;
void mul(vector<int> &a,int b){
    int t=0;
    for(int i=0;i<a.size();i++){
        t+=a[i]*b;
        a[i]=t%10;
        t=t/10;
    }
    while(t){
        a.push_back(t%10);
        t/=10;
    }
}
int main(){
    string s;
    int n;
    cin>>s>>n;
    if(n==0||s[0]=='0'){
        cout<<0;
        return 0;
    }
    reverse(s.begin(),s.end());
    vector<int> a;
    for(auto x:s)a.push_back(x-'0');
    mul(a,n);
    reverse(a.begin(),a.end());

    for(auto x:a)cout<<x;
    return 0;
}