Each book is 32 yuan. Xiaoyu wants to buy one, but there is still 15 yuan short. How much money has Xiaoyu saved?
每本书32元，小玉想买1本，还差15元，小玉已经攒了多少钱？
<gadget id="calculator">32 - 15</gadget>
<output>17</output>

<result>17</result>