#include<bits/stdc++.h> using namespace std; int main(){ double a; a=(5.0+8.0+12.0)/3.0; printf("%.3lf",a); cout<<endl; cout<<39/5<<" "<<39%5<<endl; cout<<39/8<<" "<<39%8<<endl; cout<<39/12<<" "<<39%12<<endl; return 0; }