#include <iostream>

#include <cstdio>
#include <cstring>
#include <cmath>

using namespace std;

int main () {
    float a, b, c;
    scanf("%f %f", &a, &b);
    c = ((b-1) + 0.01) * a;
    if ((float)c != 0) (int)c++;
    printf("%d", (int)c);   
    //system("pause");
    return 0;
}