#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){
	
	string s;
	cin>>s;
	
	string Z="",M="";
	
	rep(i,s.size()){
		if(s[i]=='.'){
			s.erase(s.begin(),s.begin()+i+1);
			M = s;
			break;
		}
		Z += s[i];
	}
	while(M.size()!=8)M.push_back('0');
	
	long long a = stoll(Z)*100000000 + stoll(M);
	long long b = 100000000;
	
	long long g = gcd(a,b);
	
	cout<<a/g<<'/'<<b/g<<endl;
	
    return 0;
}