#include<bits/stdc++.h>
using namespace std;
vector<int> A;
vector<int> B;


vector<int> mul(vector<int> &A, vector<int> &B)
{
    vector<int> C(A.size()+B.size());
    for (int i = 0; i < A.size(); i ++ )
        for (int j = 0; j < B.size(); j ++ )
            C[i + j] += A[i] * B[j];
    int t=0;
    for(int i=0;i<C.size();i++)
    {
        t+=C[i];
        C[i] = t%10;
        t/=10;
    }
    if(t) C.push_back(t);
    while(C.size()>1&&C.back()==0) C.pop_back();
    return C;
}

int main()
{
    string a,b;
    cin>>a>>b;
    for(int i=a.size()-1;i>=0;i--) A.push_back(a[i]-'0');
    for(int i=b.size()-1;i>=0;i--) B.push_back(b[i]-'0');
    auto C = mul(A,B);
    for(int i=C.size()-1;i>=0;i--) printf("%d",C[i]);
}