class Yukicoder
  def initialize
    s = gets.chomp

    s = s.gsub(/(\d+\*\d+)|(\+\d+)/){
      if $&['*']
        '('+$&.gsub('*','+')+')'
      else
        $&.gsub('+','*')
      end
    }

    p s

    puts eval(s)
  end
end

Yukicoder.new