#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	float d,i;
	cin>>a;
	d=a*60;
	i=d/a;
	printf("%",i);
	cout<<fixed<<setprecision(1)<<i;
} 
/**************************************************************
	Problem: 1317
	User: huxuanchen
	Language: C++
	Result: Wrong Answer
****************************************************************/