#include <iostream>
#include <stdio.h>
using std::cin;
using std::cout;
int main()
{
long double mm;
cin>>mm;
long double km = mm/1000000;
printf("%4LF", km);
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RkaW8uaD4KdXNpbmcgc3RkOjpjaW47CnVzaW5nIHN0ZDo6Y291dDsKaW50IG1haW4oKQp7CiAgbG9uZyBkb3VibGUgbW07CiAgY2luPj5tbTsKICBsb25nIGRvdWJsZSBrbSA9IG1tLzEwMDAwMDA7CiAgcHJpbnRmKCIlNExGIiwga20pOwp9Cg==