The price per kilogram of a kind of wool is 66.5 yuan. Xiao Ming's mother bought 0.8 kilograms and paid the salesperson 100 yuan. How much should I get back?
一种毛线每千克的价格是66.5元，小明的妈妈买了0.8千克，付给营业员100元钱，应找回多少钱？
<gadget id="calculator">66.5 * 0.8</gadget>
<output>53.2</output>

<gadget id="calculator">100 - 53.2</gadget>
<output>46.8</output>

<result>46.8</result>