#include<cstring>
#include<vector>
#include<cstdio>
#include<iostream>
using namespace std;
vector<int> mul(vector<int>&A, vector<int>&B) 
{
        vector<int>c(A.size()+B.size());
        int t = 0;
        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;i<c.size();i++)
        {
            t += c[i];
            c[i]=(t%10);
            t /= 10;

        }
        while (t > 0) { 
        c.push_back(t % 10);
        t /= 10;

        }
    return c;
}



int main()
{
    string a,b;
    vector<int> 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--)cout<<c[i];

}