#include <iostream>

long long pow(long long n, long long r)
{
    if (r == 1) return r;
    return n * pow(n-1, r-1);
}

long long f(long long n, long long r)
{
    long long rc = n;
    for (int i = 1; i < r ; i++) {
        rc *= n - i;
    }
    return rc / pow(r, r);
}

int main()
{
    long long n, m, a;
    std::cin >> n;
    std::cin >> m;
    a = n / m;
    a = (a % 1000) * m;
    a = a / 1000;
    if (a > 0) std::cout << f(m, a) << std::endl;
    else std::cout << 1 << std::endl;
    return 0;
}