using System;

namespace test
{
    class Program
    {
        static void Main(string[] args)
        {
            //Console.WriteLine("enter number");
            double number = double.Parse(Console.ReadLine());
            //Console.WriteLine("enter typein");
            string typeIn = Console.ReadLine().ToLower();
            //Console.WriteLine("enter typeout");
            string typeOut = Console.ReadLine().ToLower();
            double MyResult = 0.0;

            double millimeters = 1000.0;
            double centimeters = 100.0;
            double miles = 0.000621371192;
            double inches = 39.3700787;
            double kilometers = 0.001;
            double feet = 3.2808399;
            double yards = 1.0936133;


            if (typeIn == "km")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters / kilometers;
                }
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters / kilometers;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles / kilometers;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches / kilometers;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet / kilometers;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards / kilometers;
                }
                if (typeOut == "km")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / kilometers;
                }
            }

            else if (typeIn == "mi")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters / miles;
                }
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters / miles;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches / miles;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers / miles;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet / miles;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards / miles;
                }
                if (typeOut == "mi")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / miles;
                }
            }

            else if (typeIn == "yd")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters / yards;
                }
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters / yards;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles / yards;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches / yards;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers / yards;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet / yards;
                }
                if (typeOut == "yd")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / yards;
                }
          
            }

            else if (typeIn == "cm")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters / centimeters;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles / centimeters;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches / centimeters;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers / centimeters;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet / centimeters;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards / centimeters;
                }
                if (typeOut == "cm")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / centimeters;
                }

            }

            else if (typeIn == "in")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters / inches;
                }
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters / inches;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles / inches;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers / inches;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet / inches;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards / inches;
                }
                if (typeOut == "in")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / inches;
                }
               
            }

            else if (typeIn == "mm")
            {
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters / millimeters;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles / millimeters;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches / millimeters;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers / millimeters;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet / millimeters;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards / millimeters;
                }
                if (typeOut == "mm")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / millimeters;
                }
            }

            else if (typeIn == "ft")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters / feet;
                }
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters / feet;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles / feet;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches / feet;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers / feet;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards / feet;
                }
                if (typeOut == "ft")
                {
                    MyResult = number;
                }
                if (typeOut == "m")
                {
                    MyResult = number / feet;
                }
            }

            else if (typeIn == "m")
            {
                if (typeOut == "mm")
                {
                    MyResult = number * millimeters;
                }
                if (typeOut == "cm")
                {
                    MyResult = number * centimeters;
                }
                if (typeOut == "mi")
                {
                    MyResult = number * miles;
                }
                if (typeOut == "in")
                {
                    MyResult = number * inches;
                }
                if (typeOut == "km")
                {
                    MyResult = number * kilometers;
                }
                if (typeOut == "yd")
                {
                    MyResult = number * yards;
                }
                if (typeOut == "ft")
                {
                    MyResult = number * feet;
                }
                if (typeOut == "m")
                {
                    MyResult = number;
                }
            }

            else
            {
                return;
            }

            Console.WriteLine("{0:f8}", MyResult);
        }
    }
}