#include <bits/stdc++.h>
using namespace std;
int main()
{
	int n, k, q, w, e, r;
	double a, b;
	cin >> n >> k;
	for (int i = 1; i >= n; i++)
	{
		if (i % k == 0)
		{
			q += i;
			e++;
		}
		else
		{
			w += i;
			r++;
		}
	}
	a = q / e;
	b = w / r;
	printf("%.1lf %.1lf",a,b);
	return 0;
}