#include<bits/stdc++.h>
using namespace std;
typedef long long L;
const int N = 3e3 + 5;
typedef pair<int, int> P;
int a[N], b[N], c[N];
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    string A, B;
    cin >> A >> B;
    int la = 0;
    for (int i = A.size() - 1; i > -1; --i) a[++la] = A[i] - '0';
    int lb = 0;
    for (int i = B.size() - 1; i > -1; --i) b[++lb] = B[i] - '0';
    for (int i = 1; i <= la; ++i)
        for (int j = 1; j <= lb; ++j)
            c[i + j - 1] += a[i] * b[j];
    int lc = 0;
    for (int i = 1; i <= la + lb - 1||c[i]>9; ++i) {
        lc++;
        if (c[i] > 9) {
            c[i + 1] += c[i] / 10;
            c[i] = c[i] % 10;
        }
    }
    lc++;
    while (lc > 1 && c[lc] == 0) lc--;
    for (int i = lc; i>= 1; --i) cout << c[i];
}