s = gets.chomp
d = s.gsub("+","*").split("*").map &:to_i
ans = d[0]
i = 0
s.each_char do |c|
  if(c == "+")
    i += 1
    ans *= d[i]
  elsif(c == "*")
    i += 1
    ans += d[i]
  end
end
p ans