#include <iostream>
#include <iomanip>
using namespace std;
int n1;
int n2;
int num;
int k;
int n11, n22;
int main() {
	cin >> num;
	cin >> k;
	for (int i = 2; i < num; i++)
	{
		if (i%k==0)
		{
			n1 += i;
			n11 += 1;
		}
		else
		{
			n2 += i;
			n22 += 1;
		}

	}
	cout << fixed << setprecision(1) << double(n1) / double(n11) << " " << double(n2) / double(n22);
	return 0;
}