import scala.io.StdIn


object Main extends App {
  val Array(a, b, t)  = StdIn.readLine().split(" ").map(_.toInt)

  def solve(a: Int, b: Int, t: Int): Int = {
    Math.floor((t + 0.5) / a).toInt * b
  }
  println(solve(a, b, t))

}
  



