tijie<AC>

#include<bits/stdc++.h>
using namespace std;
int a[110], b[110], c[210];
string func(string sa, string sb) {
    int la = sa.size(), lb = sb.size(), lc = la + lb;
    for (int i = 0; i < la; i++) a[i] = sa[la-i-1] - '0';
    for (int i = 0; i < lb; i++) b[i] = sb[lb-i-1] - '0';
    for (int i = 0; i < la; i++) {
        for (int j = 0; j < lb; j++) {
            c[i+j] += a[i] * b[j];
            c[i+j+1] += c[i + j] / 10;
            c[i+j] %= 10;
        }
    }
    if (c[lc] > 0) lc++;
    while (c[lc-1] == 0 && lc > 1) lc--;
    string t = "";
    for (int i = lc - 1; i >= 0; i--) t += c[i] + '0';
    return t;
}
int main() {
	string sa, sb;
    cin >> sa >> sb;
    cout << func(sa, sb);
    return 0;
}