Naruto begins to train with Kakashi. Kakashi finds it exhausting working with Naruto, who can’t understand anything explained to him.
But even having figured that out,
،لكن حتّى بعدما تعلّمتُ ذلك
Ya entendí eso, ¿pero qué tiene que ver 
con reducir el periodo de entrenamiento?
Mas mesmo sabendo isso,