The unit price of eggs is 8.28 yuan per kilogram. My mother bought 2.5 kilograms and paid the salesperson 25 yuan. How much should I get back?
鸡蛋的单价是每千克8.28元，妈妈买了2.5千克，付给售货员25元，应找回多少钱？
<gadget id="calculator">8.28 * 2.5</gadget>
<output>20.7</output>

<gadget id="calculator">25 - 20.7</gadget>
<output>4.3</output>

<result>4.3</result>