#include<iostream>
#include<cstdio>
#include<ctime>
#include<cstdlib>
#include<cstring>
#include<algorithm>
#include<iomanip>
#include<math.h>
using namespace std;
int main(){
double n,k,a[10000],m=0,x=0,y=0;
cin>>n>>k;

for(int i=1;i<=n;i++){
a[i]=i;
}

for(int j=1;j<=n;j++){
if(a[j]%k==0){
m+=a[j];
x++;
}
}

for(int j=1;j<=n;j++){
if(a[j]%k!=0){
y+=a[j];
}
}

y=m/(n-x);
x=m/x;

cout<<fixed<<setprecision(1)<<x;
cout<<" ";
cout<<fixed<<setprecision(1)<<y;
}