#include<iostream>
#include<vector>

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);
        t/=10;
    }
    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');//这里是size-1

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


    return 0;

}