class Yukicoder
  def initialize
    n, m = gets.chomp.split(' ').map(&:to_f)
    n = n.to_i
    list = Array.new(n+1, 1.0)
    list[0] = 0
    list[1] = 0

    2.upto(n) do |num|
      (2*num).step(n, num) do |k|
        list[k] *= (1.0 - m)
      end
    end

    puts list.inject(:+)
  end
end

Yukicoder.new