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

long long gcd(long long a,long long b) {
    if(a % b == 0) {
        return b;
    }
    else {
        return gcd(b,a % b);
    }
}

int main() {
    string X;
    cin >> X;
    bool flag = false;
    string T = "";
    long long tmp = 1;
    for(int i = 0; i < X.size(); i++) {
        if(X[i] == '.') {
            flag = true;
        }
        else {
            T += X[i];
            if(flag) {
                tmp *= 10;
            }
        }
    }
    long long tmp2 = stoll(T);
    long long g = gcd(tmp2,tmp);
    tmp2 /= g;
    tmp /= g;
    cout << tmp2 << '/' << tmp << endl;
}