class Integer
  def mod_inverse(mod)
    self.pow(mod - 2, mod)
  end
end

P, N = gets.split.map(&:to_i)
A = gets.split.map(&:to_i)
S = gets.chomp.chars

val = A[0]

(N - 1).times do |i|
  a = A[i + 1]
  s = S[i]

  if s == '/'
    val = eval("val * a.mod_inverse(P)")
  else
    val = eval("val #{s} a")
  end

  val %= P
end

puts val