def gcd(*numbers: int) -> int:
    if len(numbers) == 1:
        return numbers[0]
    if len(numbers) == 2:
        a, b = numbers
        if a < b:
            a, b = b, a

        while True:

            if a % b == 0:
                return b
            a, b = b, a % b

    first_gcd = gcd(*numbers[:2])
    return gcd(first_gcd, *numbers[2:])


def main():
    X = float(input())
    if X == 0:
        print("0/1")
        return
    X_parent = int(1e8)
    X_child = int(X*X_parent)
    gcd_num = gcd(X_child, X_parent)
    X_child //= gcd_num
    X_parent //= gcd_num
    print(f"{X_child}/{X_parent}")


if __name__ == "__main__":
    main()