Application help

Question

namespace ICTAthlete
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.BackgroundColor = ConsoleColor.White;
            Console.ForegroundColor = ConsoleColor.DarkGreen;
            Console.WriteLine("Welcome to my Program");
            Console.ResetColor();
            string sportowiec;
            Console.WriteLine("Please write your athlete's name");
            sportowiec = Console.ReadLine();
            Console.WriteLine("How long did it take for that athlete to finish the race?");




        
        }
    }
}

 

This is my console application for determining the speed of an athlete. CAn anyone help me with the next step to convert the speed into mph and do distance/time?