#include <iostream>
#include <cmath>
int main(){
    int n, x;
    std::cin >> n >> x;
    int total_milliliters = n * 1000;
    int cup_count = std::ceil(static_cast<double>(total_milliliters) / x);
    std::cout << cup_count << std::endl;
    return 0;
}
/**************************************************************
	Problem: 1309
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/