#include<iostream>
using namespace std;
int main()
{
    int n,k;
    double sa=0,a=0,sb=0,b=0;
    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        if(i%k==0)
        {
            sa++;
            a+=i;
        }
        else
        {
            sb++;
            b+=i;
        }
    }
    cout<<(double)a/sa<<" "<<(double)b/sb;
}