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

const int N = 2010;
string a, b;
vector<int> A, B;
int ans[N * 2];

void mult(vector<int> A, vector<int> B) 
{
    for (int i = 0; i < A.size(); i++)
    {
        for (int j = 0; j < B.size(); j++)
        {
            //i在第0位时不要用错位
            //在第一位时要错一位
            //第二位是错两位...以此类推
            ans[j + i] += A[i] * B[j];
            if (ans[i + j] >= 10) 
            {
                ans[i + j + 1] += ans[i + j] / 10;
                ans[i + j] %= 10;
            }
        }
    }

    int pos = 0;
    for (int i = A.size() + B.size() - 1; i >= 0; i--)
        if (ans[i] != 0)
        {
            pos = i;
            break;
        }

    for (int i = pos; i >= 0; i--) cout << ans[i];
}

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');

    mult(A, B);

    return 0;
}