#include<bits/stdc++.h>
using namespace std;
int main(){
    int n, k, c;
    double a, b;
    cin>>n>>k;
    c=n/k;
    a=c*(c+1)/2*k;
    b=n*(n+1)/2-a;
    cout<<fixed<<setprecision(1)<<a<<" "<<b;
    return 0;
}