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

int main(){
    double X;cin >> X;
    double anser = X;
    int count = 1;
    while(anser < 1){
        anser *= 10;
        count *= 10;
    }
    //cout << anser << count;
    bool can_a = true;
    bool can_b = true;
    int anser_int = anser;
    while(can_a || can_b){
        if(anser_int%2 == 0 && count%2 == 0){
            anser_int/=2;
            count/=2;
        }
        else can_a = false;
        if(anser_int%5 == 0 && count%5 == 0){
            anser_int/=5;
            count/=5;
        }
        else can_b = false;
    }
    cout << anser_int << '/' << count << endl;
    
}