import java.math.BigDecimal
import java.math.RoundingMode

fun main() {
    val s = 50
    val d = readLine()!!
    val (a, b) = d.split(' ').map(String::toInt)
    val v = BigDecimal(a.toBigInteger(), s).divide(BigDecimal(b.toBigInteger(), s), RoundingMode.FLOOR)
    val z = v.toPlainString()
    println(z)
}