#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define chmin(x,y) x = min((x),(y))
#define chmax(x,y) x = max((x),(y))
#define popcount(x) __builtin_popcount(x)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
const int INF = 1e9;
const long long LINF = 1e17;
//const int MOD = 1000000007;
const int MOD = 998244353;
const double PI = 3.14159265358979323846;

long long str_int(const string& s){
    long long t = 1;
    long long res = 0;
    for(int i=(int)s.size()-1;i>=0;i--){
        res += (s[i]-'0') * t;
        t *= 10;
    }
    return res;
}

long long str_float_int(const string& s,int pow10){
    long long t = 1;
    for(int i=0;i<pow10;i++) t *= 10;

    int ind = -1;
    for(int i=0;i<(int)s.size();i++){
        if(s[i] == '.') ind = i;
    }

    if(ind == -1) return str_int(s) * t;
    long long res = str_int(s.substr(0,ind)) * t;
    string under_point = s.substr(ind+1);
    while((int)under_point.size() < pow10) under_point += "0";
    res += str_int(under_point);
    return res;
}


int main(){
    string x;
    cin >> x;
    ll b = 1000000000;
    ll s = str_float_int(x,9);
    while(b%2 == 0 && s%2 == 0) b/=2,s/=2;
    while(b%5 == 0 && s%5 == 0) b/=5,s/=5;
    cout << s << "/" << b << endl;
    return 0;
}