class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            double leaveMoney = double.Parse(Console.ReadLine());
            List<double> list = new List<double>();
            for(int i = 0; i < n; i++)
            {
                if(i == 0)
                {
                    list.Add(100);
                }
                else
                {
                    list.Add(list[i-1]*(1-leaveMoney));
                }
            }
            double ans = 0;
            foreach (double i in list)
            {
                ans += i;
            }

            Console.WriteLine(ans);
        }
    }