DefaultController.php

<?php
namespace ACC\MainBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
class DefaultController extends Controller
{
    /**
     * @Route("/", name="accmain_index")
     * @Template()
     */
    public function indexAction()
    {
      	$measurement = $this->get('akeneo_measure.manager')->makeMeasurement(15.42, 'cm');
      	
        $form = $this->createForm('acrdMeas_measurement', $measurement, array('unitFamily' => 'Area'));
        
        return array('form' => $form->createView(), 'measure'=>$measurement);
    }
}