using System;

namespace MetricConverter
{
    class Program
    {
        static void Main(string[] args)
        {
            double number = double.Parse(Console.ReadLine());
            string input = Console.ReadLine();
            string output = Console.ReadLine();

            double result = 0;

            if (input == "mm")
            {
                if (output == "mm")
                {
                    result = number;
                }
                else if (output == "cm")
                {
                    result = number / 10;
                }
                else if (output == "m")
                {
                    result = number / 1000;
                }
                else if (output == "km")
                {
                    result = number / 1000000;
                }
                else if (output == "mi")
                {
                    result = number / 1.609000000;
                }
                else if (output == "in")
                {
                    result = number / 25.4;
                }
                else if (output == "ft")
                {
                    result = number / 305;
                }
                else if (output == "yd")
                {
                    result = number / 914;
                }
            }

            else if (input == "cm")
            {
                if (output == "mm")
                {
                    result = number * 10;
                }
                else if (output == "cm")
                {
                    result = number;
                }
                else if (output == "m")
                {
                    result = number / 100;
                }
                else if (output == "km")
                {
                    result = number / 100000;
                }
                else if (output == "mi")
                {
                    result = number / 160934;
                }
                else if (output == "in")
                {
                    result = number / 2.54;
                }
                else if (output == "ft")
                {
                    result = number / 30.48;
                }
                else if (output == "yd")
                {
                    result = number / 91.44;
                }
            }

            else if (input == "m")
            {
                if (output == "mm")
                {
                    result = number * 1000;
                }
                else if (output == "cm")
                {
                    result = number * 100;
                }
                else if (output == "m")
                {
                    result = number;
                }
                else if (output == "km")
                {
                    result = number / 1000;
                }
                else if (output == "mi")
                {
                    result = number * 0.000621371192;
                }
                else if (output == "in")
                {
                    result = number * 39.3700787;
                }
                else if (output == "ft")
                {
                    result = number * 3.2808399;
                }
                else if (output == "yd")
                {
                    result = number * 1.0936133;
                }
            }

            else if (input == "km")
            {
                if (output == "mm")
                {
                    result = number * 1000000;
                }
                else if (output == "cm")
                {
                    result = number * 100000;
                }
                else if (output == "m")
                {
                    result = number * 1000;
                }
                else if (output == "km")
                {
                    result = number;
                }
                else if (output == "mi")
                {
                    result = number / 1.609;
                }
                else if (output == "in")
                {
                    result = number * 39370.00787;
                }
                else if (output == "ft")
                {
                    result = number * 3280.8399;
                }
                else if (output == "yd")
                {
                    result = number * 1093.6133;
                }
            }

            else if (input == "mi")
            {
                if (output == "mm")
                {
                    result = number * 1.609000000;
                }
                else if (output == "cm")
                {
                    result = number * 160934;
                }
                else if (output == "m")
                {
                    result = number * 1609;
                }
                else if (output == "km")
                {
                    result = number * 1.609;
                }
                else if (output == "mi")
                {
                    result = number;
                }
                else if (output == "in")
                {
                    result = number * 63360;
                }
                else if (output == "ft")
                {
                    result = number * 5280;
                }
                else if (output == "yd")
                {
                    result = number * 1760;
                }
            }

            else if (input == "in")
            {
                if (output == "mm")
                {
                    result = number * 25.4;
                }
                else if (output == "cm")
                {
                    result = number * 2.54;
                }
                else if (output == "m")
                {
                    result = number / 39.37;
                }
                else if (output == "km")
                {
                    result = number / 39370;
                }
                else if (output == "mi")
                {
                    result = number / 63360;
                }
                else if (output == "in")
                {
                    result = number;
                }
                else if (output == "ft")
                {
                    result = number / 12;
                }
                else if (output == "yd")
                {
                    result = number / 36;
                }
            }

            else if (input == "ft")
            {
                if (output == "mm")
                {
                    result = number * 305;
                }
                else if (output == "cm")
                {
                    result = number * 30.48;
                }
                else if (output == "m")
                {
                    result = number / 3.2808399;
                }
                else if (output == "km")
                {
                    result = number / 3280.8399;
                }
                else if (output == "mi")
                {
                    result = number / 5280;
                }
                else if (output == "in")
                {
                    result = number * 12;
                }
                else if (output == "ft")
                {
                    result = number;
                }
                else if (output == "yd")
                {
                    result = number / 3;
                }
            }

            else if (input == "yd")
            {
                if (output == "mm")
                {
                    result = number * 914;
                }
                else if (output == "cm")
                {
                    result = number * 91.44;
                }
                else if (output == "m")
                {
                    result = number / 1.0936133;
                }
                else if (output == "km")
                {
                    result = number / 1093.6133;
                }
                else if (output == "mi")
                {
                    result = number / 1760;
                }
                else if (output == "in")
                {
                    result = number * 36;
                }
                else if (output == "ft")
                {
                    result = number * 3;
                }
                else if (output == "yd")
                {
                    result = number;
                }
            }
            Console.WriteLine(result);
        }
    }
}