object Main {
  def main(args: Array[String]) = {
    val sc = new java.util.Scanner(System.in)
    val A = sc.nextInt
    val B = sc.nextInt
    val T = sc.nextInt
    sc.close()

    val createCount = Math.floor((T + 0.5) / A).toInt
    val createNum = createCount * B
    println(createNum)
  }
}