#include<iostream>
#include<algorithm>
#include<string>
#include<cstdlib>
#include<cstring>
#include<utility>
using namespace std;
int num1[5000], num2[5000], num3[5000];
char str1[5000], str2[5000];
int main(){
    cin >> str1 >> str2;
    if (str1[0] == '0' || str2[0] == '0'){
        cout << 0;
        return 0;
    }
    int len1 = strlen(str1) - 1, len2 = strlen(str2) - 1;
    for (int i = len1; i >= 0; i--)num1[len1 - i + 1] = str1[i] - '0';
    for (int i = len2; i >= 0; i--)num2[len2 - i + 1] = str2[i] - '0';
    len1++;
    len2++;
    for (int i = 1; i <= len1; i++){
        for (int j = 1; j <= len2; j++){
            num3[i + j - 1] += num1[i] * num2[j];
        }
    }
    int i;
    for (i = 1; i<=len1+len2-1; i++){
        num3[i + 1] += num3[i] / 10;
        num3[i] %= 10;
    }
    for (int i = len1 + len2 - 1; i >= 1; i--){
        cout << num3[i];
    }
}