#include <stdio.h>
#include <string.h>
#define N 100000
#define N1 10000000
int len1, len2;
void mul(int a[], int b[])
{
    int c[N1] = {0};
    int th1, t = 0;
    int i, j, k;
    for (i = 0; i < len2; i++)
    {
        for (j = i, k = 0, t = 0; k < len1; j++, k++)
        {
            th1 = a[k] * b[i];
            c[j] = c[j] + th1 + t;
            t = c[j] / 10;
            c[j] %= 10;
        }
        if (t)
        {
            c[j] = t;
            t = 0;
        }
    }
    while (c[j] == 0 && j > 0)
        j--;
    for (i = j; i >= 0; i--)
        printf("%d", c[i]);
}
int main()
{
    char str1[N], str2[N];
    int num1[N] = {0}, num2[N] = {0};
    int i, j;
    scanf("%s", str1);
    scanf("%s", str2);

    len1 = strlen(str1), len2 = strlen(str2);
    for (i = 0, j = len1 - 1; i < len1; i++, j--)
        num1[i] = str1[j] - '0';
    for (i = 0, j = len2 - 1; i < len2; i++, j--)
        num2[i] = str2[j] - '0';
    mul(num1, num2);
    return 0;
}