#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,k,s=0,m=0;
    int a=0,b=0;
    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        if(i%k==0)
        {
            s+=i;
            a++;
        }
        else if(i%k!=0)
        {
            m+=i;
            b++;
        }
    }
    if(k==0)
    {
        cout<<0.0<<" "<<0.0;
    }
    if(a==0)
    {
        cout<<0.0<<" "<<setprecision(1)<<fixed<<(double)(m/b)<<endl;
    }
    if(b==0)
    {
        cout<<setprecision(1)<<fixed<<(double)(s/a)<<" "<<0.0<<endl;
    }
    cout<<setprecision(1)<<fixed<<(double)(s/a)<<" "<<(double)(m/b)<<endl;
    return 0;
}