"Little Xin'er, what book are you reading so early in the morning?" asked Zhu Wenchang, hurrying over with a playful grin when he saw she was holding a book.
Hearing this, Xin'er raised the book and said, "This is Young Master Brother's Mathematical Classic. I had nothing to do this morning, so I just flipped through it."
Speaking of this Mathematical Classic, along with another book called Detailed Explanations of Arithmetic, Wang Kan had brought them both over yesterday.
Chapter 128