singleton 결과값이 변경되지 않습니다.

안녕하세요.

해당 강의 실습시 해결되지 않는 부분이 있어 문의 드립니다.
bind -> singleton 으로 변경했는데요. 결과값이 변경되지 않습니다. 어느부분을 놓쳤는지 알려주시면 감사하겠습니다.

• 결과값

  

   

• Acontroller.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class Acontroller extends Controller
{
    protected $result;
    protected $basecontroller;

    public function __construct(Basecontroller $basecontroller) //서비스 컨테이너
    {
        $this->basecontroller = $basecontroller;
    }

    public function multiple($num)
    {
        $this->result = $this->basecontroller->plus($num)*10;
        return $this->result;
    }
}

• Basecontroller.php

  <?php
  
  namespace App\Http\Controllers;
  
  use Illuminate\Http\Request;
  
  class Basecontroller extends Controller
  {
      protected $result;
  
      public function __construct()
      {
          $this->result = 0;
      }
  
      public function plus($num)
      {
          $this->result = $num+5;
          return $this->result;
      }
  
  }
  

• Aprovider.php

  <?php
  
  namespace App\Providers;
  
  use Illuminate\Support\ServiceProvider;
  use App\Http\Controllers\Acontroller;
  use App\Http\Controllers\Basecontroller;
  
  class Aprovider extends ServiceProvider
  {
      /**
       * Register services.
       */
      public function register(): void
      {
          $this->app->singleton(Acontroller::class, function($app) {
              return new Acontroller($app->make(Basecontroller::class));
          });
      }
  
      /**
       * Bootstrap services.
       */
      public function boot(): void
      {
          //
      }
  }
  

• web.php

  <?php
  
  use Illuminate\Support\Facades\Route;
  use App\Http\Controllers\Acontroller;
  
  Route::get('/', function () {
      return view('welcome');
  });
  
  Route::get('/one', function () {
      for ($i=0; $i < 3; $i++)
      {
          echo app(Acontroller::class)->multiple(2);
          echo "<br />";
      }
  
      return "------------";
  });
  
  

• app.php

  App\Providers\AppServiceProvider::class,
  App\Providers\AuthServiceProvider::class,
  // App\Providers\BroadcastServiceProvider::class,
  App\Providers\EventServiceProvider::class,
  App\Providers\RouteServiceProvider::class,
  App\Providers\Aprovider::class,