#include<iostream>

using namespace std;

int main()
{
    int n,k,a=0,b=0,c=0,d;
    cin>>n>>k;
    for(int i=n;i;i--)
    {if(i%k==0){a+=i;c++;}
    else b+=i;}
    d=n-c;
    cout<<a*1.0/c<<" "<<b*1.0/d;
    
}