#include <iostream> #include <cstdio> using namespace std ; int main () { int n , beizishuliang ; double t , pingjunzhi; cin >> t >> n ; beizishuliang = n * 2 ; pingjunzhi = t / beizishuliang * 1.0; printf ( "%.3f\n" , pingjunzhi ) ; cout << beizishuliang ; return 0 ; }