#include <bits/stdc++.h>
using namespace std;

string s;
int i, a, b;

int main()
{
	cin >> s;

	while (s[i] != '/')
		i++;

	a = stoi(s.substr(0, i));
	b = stoi(s.substr(i + 1, s.size() - i - 1));

	cout << (double)a / (double)b << endl;
}