Xiaohua's mother bought 28.6 yuan meat dishes and 21.48 yuan element dishes in the supermarket, and also bought a box of 31.4 yuan beer. I gave 100 yuan to the supermarket cashier, how much should I get back?
小华妈妈在超市买了28.6元荤菜和21.48元素菜，还买了一箱31.4元啤酒．给了超市收银员100元，应找回多少元？
<gadget id="calculator">28.6 + 21.48 + 31.4</gadget>
<output>81.48</output>

<gadget id="calculator">100 - 81.48</gadget>
<output>18.52</output>

<result>18.52</result>