import java.util.Scanner

fun main(args: Array<String>){
    val scanner = Scanner(System.`in`)
    val result = D0427A(
                    interval     = scanner.nextInt()
                   ,createAmount = scanner.nextInt()
                   ,limit        = scanner.nextInt()
                 ).judge()
    println(result)
}

class D0427A(
  val interval:     Int
 ,val createAmount: Int
 ,val limit:        Int
){
    private val ADD_TO_LIMIT = 0.5
    fun judge(): Int{
        val timesCreated = ((limit + ADD_TO_LIMIT) / interval).toInt()
        return timesCreated * createAmount
    }
}