Xiaofang buys a set of "Charlie IX" series of books, each set has 8 books, each book is 15 yuan, and she gives the salesperson 200 yuan, how much should she get back?
小芳买一套《查理九世》丛书，每套有8本，每本15元，给售货员200元，应找回多少钱？
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">200 - 120</gadget>
<output>80</output>

<result>80</result>