#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, k, a = 0, b = 0, c = 0;
    double sum1 = 0, sum2 = 0;
    cin >> n >> k;
    for (int i = 1;i <= n;i ++)
    {
        a ++;
        if (n%k == 0)
        {
            sum1 = sum1 + a;
            b ++;
        }
        else 
        {
            sum2 = sum2 + a;
            c ++;
           }
	}
    cout << fixed << setprecision(1) << sum1 / b * 1.0;
    cout << " " << fixed << setprecision(1) << sum2 / c * 1.0;
    return 0;
}

我不李姐