#include<iostream>
#include<algorithm>
#include<string>
#include<vector>
#include<bitset>
using namespace std;
using ll=long long;
vector<int> mul(vector<int>& a,int b)
{
    //高精度乘法
    int t=0;
    vector<int> c;
    for(int i = 0;i < a.size() || t != 0 ; ++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()
{
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    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');
    vector<int> c = mul (a, b);
    for(int i = c.size() - 1; i >= 0 ;--i)cout<<c[i];
    return 0;
}