fun gcd(a: Long, b: Long) : Long{
    return if(b == 0L) a else gcd(b, a%b)
}

fun power(n: Int) : Long{
    var ret = 1L
    repeat(n){
        ret *= 10
    }
    return ret
}

fun main(){
    val x = readLine()!!
    var s = x.replace(".","").toLong()
    var b = if(x.contains(".")) power(x.length-2) else 1
    val p = gcd(s, b)
    s /= p
    b /= p
    println("%d/%d".format(s, b))
}