using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace programPractice
{
    class Program
    {
        public static void Main(string[] args)
        {
            int[] n = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int result = n[0] * (n[1] + 100) / 100;
            Console.WriteLine(result);
        }
    }
}