#include <bits/stdc++.h>

using namespace std;

const int N = 1e5 + 10;
int a[N], al;

void mul(int a[], int &al, int b) {
    int t = 0;
    for (int i = 1; i <= al; i++) {
        t += a[i] * b;
        a[i] = t % 10;
        t /= 10;
    }
    if (t) a[++al] = t;
    while (al > 1 && a[al] == 0) al--;
}

int main() {
    string x;
    int y;
    cin >> x >> y;
    for (int i = x.size() - 1; i >= 0; i--) a[++al] = x[i] - '0';
    mul(a, al, y);
    for (int i = al; i; i--) printf("%d", a[i]);
    return 0;
}