Simple task-based async code descripting

Program.cs

using System;
using System.Threading;
using System.Threading.Tasks;

namespace Async
{
    class Program
    {
        static void Main(string[] args)
        {
            StartFirstLongTask();
            StartSecondLongTask();
            Console.ReadLine();
        }

        static async void StartFirstLongTask()
        {
            string result = await FirstLongTask();
            Thread.Sleep(3000);
            Console.WriteLine($"An end of the {result}");
        }

        static async void StartSecondLongTask()
        {
            string result = await SecondLongTask();
            Thread.Sleep(1000);
            Console.WriteLine($"An end of the {result}");
        }

        static Task<string> FirstLongTask()
        {
            return Task.Run(() => "first long task.");
        }

        static Task<string> SecondLongTask()
        {
            return Task.Run(() => "second long task.");
        }
    }
}