
fun main(args:Array<String>):Unit {
    val (n, t) = readLine()!!.trim().split(' ').map(String::toInt)
    println(
            String.format("%.5f",Array(n){
                val (x, h) = readLine()!!.trim().split(' ').map(String::toDouble)
                h * t / x
            }.max())
    )
}
