#include<bits/stdc++.h>
using namespace std; 
int main()
{   
    int n,k,i=1;
    double sa=0,ga=0,gb=0,sb=0;
    cin>>n>>k; 
    while(i<=n)
    {
        if(i%k==0)
        {
            ga=ga+i;
            sa=sa+1;
        }
        else 
        {
           gb=gb+i;
           sb=sb+1;
        }
        i++;
        

    }
    cout<<fixed<<setprecision(1)<<ga/sa<<" "<<fixed<<setprecision(1)<<gb/sb;
    return 0;
}