#include <iostream>
#include <string>

#define SIZE 25

using namespace std;

class LongNumber {

public:
    int data[SIZE];

    LongNumber() {

        for (int i = 0; i < SIZE; i++)
            data[i] = 0;

    }

    LongNumber(string _no) {

        for (int i = 0; i < SIZE; i++) {
            data[i] = 0;
        }

        int index = SIZE - 1;

        for (int i = _no.length() - 1; i >= 0; i--, index--) {
            data[index] = _no[i] - '0';
        }
    }

    LongNumber operator *(LongNumber& x) {

        LongNumber ret;
        int carry = 0;
        int mat[2 * SIZE + 1][2 * SIZE] = { 0 };

        for (int i = SIZE - 1; i >= 0; i--) {

            for (int j = SIZE - 1; j >= 0; j--) {
                carry += data[i] * x.data[j];

                int index = SIZE - 1 - ((SIZE - 1 - i) + (SIZE - 1 - j));

                if (index >= 0) {
                    if (carry < 10) {
                        mat[i][SIZE - 1 - ((SIZE - 1 - i) + (SIZE - 1 - j))] = carry;
                        carry = 0;
                    }
                    else {
                        mat[i][SIZE - 1 - ((SIZE - 1 - i) + (SIZE - 1 - j))] = carry % 10;
                        carry = carry / 10;
                    }
                }
            }
        }
        for (int i = 1; i < SIZE + 1; i++) {
            for (int j = SIZE - 1; j >= 0; j--) {
                carry += mat[i][j] + mat[i - 1][j];

                if (carry < 10) {

                    mat[i][j] = carry;

                    carry = 0;

                }

                else {

                    mat[i][j] = carry % 10;

                    carry = carry / 10;

                }
            }
        }


        for (int i = 0; i < SIZE; i++) {
            ret.data[i] = mat[SIZE][i];
        }

        return ret;
    }

    void print() {

        int start = 0;
        for (int i = 0; i < SIZE; i++)
            if (data[i] != 0) {
                start = i;
                break;
            }

        for (int i = start; i < SIZE; i++)

            cout << data[i];
        cout << endl;
        return;

    }
};

int main() {

    string str1, str2;
    cin >> str1 >> str2;

    LongNumber n1(str1);
    LongNumber n2(str2);

    LongNumber n3 = n1 * n2;

    int k = 0;
    for (int i = 0; i < SIZE; i++)
    {
        if (n3.data[i] == 0)
        {
            k++;
        }
        else
            break;
    }

    if (k == SIZE) {
        cout << "0" << endl;
    }

    else {

        for (int i = k; i < SIZE; i++) {
            cout << n3.data[i];
        }
    }

    return 0;

}