Mr. Li spent 24.28 yuan on math reference books and 23.76 yuan on Chinese reference books. 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，买语文参考书用了23.76元，他付给售货员50元，应找回多少钱？
<gadget id="calculator">24.28 + 23.76</gadget>
<output>48.04</output>

<gadget id="calculator">50 - 48.04</gadget>
<output>1.96</output>

<result>1.96</result>