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

namespace _01.Wormtest
{
    class Program
    {
        static void Main(string[] args)
        {
            var wormLength = int.Parse(Console.ReadLine());
            var wormWidth = double.Parse(Console.ReadLine());
            var lengthInCm = wormLength * 100;
            var reminder = lengthInCm % wormWidth;

            if (reminder == 0 || lengthInCm == 0 || wormWidth == 0)
            {
                var result = lengthInCm * wormWidth;
                Console.WriteLine($"{result:f2}");
            }
            else
            {
                var result = lengthInCm / wormWidth * 100;
                Console.WriteLine($"{result:f2}%");
            }
        }
    }
}