#include<bits/stdc++.h>
using namespace std;

string a, b;
vector<int> A, 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];

    for(int i = 0, t = 0; i < C.size(); ++ i){
        t += C[i];
        C[i] = t % 10;
        t /= 10;
    }

    while(C.size() > 1 && C.back() == 0) C.pop_back();

    return C;
}

int main(){
    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) cout << C[i];



    return 0;
}