Zhejiang Library is a public library in Hangzhou, China. Founded in 1900 during the Qing dynasty, it is among the earliest provincial public libraries in China. It is designated a National First-Class Library and a National Key Ancient Books Preservation and Conservation Institution by the Chinese government. The Zhejiang Library's Zhijiang New Branch, located in the Zhijiang Cultural Center, opened in 2023. Prior to its inauguration, the Shuguang Road Branch served as the main library of Zhejiang Library.
To enter the library for reading, only a security check is required—no ID or registration is needed, but bringing a passport is advised. The Shuguang Road Branch operates from 9:00 AM to 9:00 PM (Tuesday to Sunday).
浙江图书馆，创建于清光绪二十六年（1900年），是中国创办最早的省级公共图书馆之一，现为国家一级图书馆、全国古籍重点保护单位。位于之江文化中心的浙江图书馆之江新馆2023年启用前，曙光路馆为浙江图书馆总馆。
进入图书馆阅读只需要安检，无须证件、无须注册，不过最好还是带上证件备用，曙光路馆开馆时间为9:00-21:00（周二至周日）。
The cache is NOT at the posted coordinates and the cache is NOT inside the library building. You need to solve the Step 1 puzzle first, then visit the library for Step 2 to get the final coordinates.
Step 1: Find four books related to this cache, sort them in chronological order by publication date, and record the last digit of their ISBNs to obtain A, B, C, D.
Step 2: Locate the shelves where these four books should be placed in the "Chinese & Foreign Books Circulation Room" of the library, and gather the following information:
E = The total number of layers/shelves per bookshelf.
F = The row number (counted from north to south in the room) where the shelf of the most recently published book is located.
G = The shelf number (using the label on each shelf, label format 'A架B面C列D层', take the value of A) where the book that has the most different classification from the other three books should be placed.
Calculate the coordinates of the cache using the following formula:
N 30° 15.(G*D*F+C*E*B-F*A-56)′ E 120° 07.(E*D*G/3-A*B*C*F*2+55)′
宝藏不在发布的坐标位置，也不在图书馆室内。你需要先找到谜题第一步的答案，然后再去图书馆找到相应的线索，才能计算出最后的坐标。
第一步：找到与本谜题相关的四本书，按出版日期从旧到新排序，记录下它们的ISBN的最后一位，得到A、B、C、D。
第二步：在图书馆的“开架图书借阅室”内找到这四本书应该所在的书架，采集以下信息：
E=每个书架总共有多少层
F=最近出版的一本书应该所在书架在该借阅室中是从北向南数的第几排
G=四本书中分类与其它书差异最大的一本应该所在的书架号（每层书架上都有一个标签“A架B面C列D层”，取其中的A值）
用下面的公式计算Cache所在的坐标：
N 30° 15.(G*D*F+C*E*B-F*A-56)′ E 120° 07.(E*D*G/3-A*B*C*F*2+55)′
