How to divide two columns in Laravel?

I am retrieving each ID's rows per page. And in that ID's page I want to divide two columns(extend / price) value. How can I add the divide "/" math into this function and also retrieve that divide result too?

public function show($id)
{
    $estates = allestates::where('id', $id)->first();

    return view('pages.show', ['estates' => $estates]);
}

Thanks for helping me out!

via Chebli Mohamed