Auntie spent 76.4 yuan on shoes and 13.8 yuan on socks. The aunt paid the salesperson 100 yuan, how much should I get back?
阿姨买鞋用去了76.4元，买袜子用去了13.8元．阿姨付给售货员100元，应找回多少元？
<gadget id="calculator">76.4 + 13.8</gadget>
<output>90.2</output>

<gadget id="calculator">100 - 90.2</gadget>
<output>9.8</output>

<result>9.8</result>