Three workers in a binding workshop want to pack a batch of books and send them to the post office (the number of books in each bag is required to be the same). For the first time, they brought this batch of books (3/5), and ended up printing 7 packs with 60 more books. In the second time, they brought all the remaining books, together with the extra change from the first time, Just made another 6 packs. How many books are there in total?
某装订车间的三个工人要将一批书打包后送往邮局(要求每个包内所装书的册数同样多)．第1次，他们领来这批书的(3/5)，结果打了7包还多60本，第2次他们把剩下的书全部领来了，连同第一次多的零头一起，刚好又打6包．这批书共有多少本？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">7 + 6</gadget>
<output>13</output>

<gadget id="calculator">7 / 13</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">(3/5) - (7/13)</gadget>
<output>4/65 = around 0.061538</output>

<gadget id="calculator">60 / (4/65)</gadget>
<output>975</output>

<result>975</result>