#include <bits/stdc++.h>
#include <atcoder/all>

typedef unsigned long long ULLONG;
typedef long long LLONG;
static const LLONG MOD_NUM = 1000000007LL; //998244353LL;
static const LLONG INF_NUM = LLONG_MAX;
template<class _T> static void get(_T& a) {
	std::cin >> a;
}
template<class _T> static void get(_T& a, _T& b) {
	std::cin >> a >> b;
}
template<class _T> static void get(_T& a, _T& b, _T& c) {
	std::cin >> a >> b >> c;
}
template <class _T> static _T tp_abs(_T a) {
	if (a < (_T)0) {
		a *= (_T)-1;
	}
	return a;
}
template <class _T> static _T tp_pow(int x, int exp)
{
	_T ans = 1;
	_T base = x;
	while (exp > 0) {
		if (exp & 1) {
			ans = (ans * base);
		}
		base = (base * base);
		exp >>= 1;
	}
	return ans;
}
template <class _T> static _T tp_gcd(_T first, _T second)
{
	_T num1 = first, num2 = second;
	_T remainder = 0, common = 0;

	if (!num1) return num2;
	if (!num2) return num1;

	while (!common) {
		remainder = num1 % num2;

		if (remainder == 0) {
			common = num2;
		}
		else {
			num1 = num2;
			num2 = remainder;
		}
	}
	return(common);
}
template <class _T> static _T tp_lcm(_T first, _T second) {
	_T gcd = tp_gcd<_T>(first, second);
	return first * second / gcd;
}

static void task();

int main()
{
	task();
	fflush(stdout);
	return 0;
}

static void task()
{
	long double X;
	get(X);

	LLONG targ = X * (long double)1000000000.0;
	LLONG mul = 1000000000LL;
	LLONG gcd = 0;
	while ((gcd = tp_gcd<LLONG>(targ, mul)) != 1LL) {
		targ /= gcd;
		mul /= gcd;
	}
	printf("%lld/%lld\n", targ, mul);
}