include <bits/stdc++.h>

using namespace std;

int main() {

int A, B, i = 0, j = 0, k, sum = 0;
cin >> A >> B;
int a[10] = {0}, b[10] = {0};
while (A ) {
	a[i] = A % 10;
	A = A / 10;
	i++;
}
while (B) {
	b[j] = B % 10;
	B = B / 10;
	j++;
}
for (k = 0; k < 10; k++) {
	for (int r = 0; r < 10; r++) {
		sum = sum + a[k] * b[r];
	}
}
cout << sum;
return 0;

}