#include<bits/stdc++.h>
using namespace std;
int main()
{
	double k,n,a,x=0,y=0,xx=0,yy=0,aa,bb;
	 
	cin>>n>>k;
	for(a=k;a<=n;a=a+1){
		if(int(a)%int(k)==0){
			x=x+a;
			xx=xx+1;
		}
		else{
			y=y+a;
			yy=yy+1;
		}
	}
	aa=x/xx;
	bb=y/yy;
	printf("%.1lf %.1lf",aa,bb);
	return 0;
 }