#include <bits/stdc++.h>
using namespace std;
int main ()
{
	int n,k,a,e=0,r=0;
	float m,c,s=0,t=0;
	cin>>n>>k;
	for (int i=1;i<=n;i++)
		{
			a=i;
			if(a%k==0)
				{
				s+=a;
				e++;
				}
			else if(a%k!=0)
				{
				t+=a;
				r++;
				}
		 } 
	m=s/e;
	c=t/r;
	cout<<fixed<<setprecision(1)<<m<<' '<<c;
	return 0;
}