Wushu Tao
(http://wushu-tao.com)

Writing sheet of the characters :

• dāng rán 当然 (Certainement / sans doute / évidemment / bien sûr)

                                                                                                                                                                                                                                    
For more informations about these characters and their pronunciations, consult this page :
http://wushu-tao.com/page_ac_liste_car.php