#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	string a,b;
	cin>>s;
	for(int i=0;i<s.find("/");i++){
		a.push_back(s[i]);
	}
	for(int i=s.find("/")+1;i<=s.size()-1;i++){
		b.push_back(s[i]);
	}
	cout<<stod(a)/stod(b)<<endl;
}