#include<stdio.h>
long long int gcd(long long int a, long long int b)
{
	if (a == 0 || b == 0)
		return 1;
	long long int r = a % b;
	while (r > 0)
	{
		a = b;
		b = r;
		r = a % b;
	}
	return b;
}
int main()
{
	char x[32];
	scanf("%s", x);
	long long int s, b, i, f;
	s = 0;
	b = 1;
	f = 0;
	for (i = 0; x[i] != '\0'; i++)
	{
		if (x[i] == '.')
			f++;
		else
		{
			s = 10 * s + x[i] - '0';
			if (f > 0)
				b *= 10;
		}
	}
	printf("%lld/%lld\n", s / gcd(s, b), b / gcd(s, b));
	return 0;
}