#include<stdio.h>
#include<string.h>
char numberN[1000005], numberM[1000005];
int c[2000005];
int main() {
scanf("%s%s", numberN, numberM);
int n = strlen(numberN), m = strlen(numberM);
int a[n], b[m];
int i, j;
for (i = 0, j = n - 1; i < n; i++, j--) {
a[i] = numberN[j] - '0';
}
for (i = 0, j = m - 1; i < m; i++, j--) {
b[i] = numberM[j] - '0';
}
for (i = 0; i < 2000005; i++) {
c[i] = 0;
}
for (i = 0; i < n; i++) {
for (j = 0; j < m; j++) {
c[i + j] += a[i] * b[j];
}
}
for (i = 0; i < n + m; i++) {
if (c[i] >= 10) {
c[i + 1] += c[i] / 10;
c[i] %= 10;
}
}
for (j = 2000004; j > 0; j--) {
if (c[j] != 0)
break;
}
for (i = j; i >= 0; i--) {
printf("%d", c[i]);
}
printf("\n");
return 0;
}