Mr. Li spent 24.28 yuan on math reference books, and he paid the salesperson 50 yuan. How much should he get back?
李老师买数学参考书用了24.28元，他付给售货员50元，应找回多少钱？
<gadget id="calculator">50 - 24.28</gadget>
<output>25.72</output>

<result>25.72</result>