import scala.io.StdIn

object Main {
  def parsing(j: Int, s: String): Int = {
    for (i <- (0 to j).reverse) {
      s(i - 1) match {
        case '+' =>
          return parsing(i - 1, s) * s.slice(i, j).toInt
        case '*' =>
          return parsing(i - 1, s) + s.slice(i, j).toInt
        case '#' =>
          return s.slice(i, j).toInt
        case _ =>
      }
    }

    return -1
  }

  def main(args: Array[String]): Unit = {
    val s = "#" + StdIn.readLine
    println(parsing(s.length, s))
  }
}