Apples are 2.5 yuan per kilogram, and cherries are 8.6 yuan per kilogram. Naughty bought 6 kilograms of apples and 2 kilograms of cherries. He gave the salesperson 50 yuan. How much should I get back?
苹果每千克2.5元，樱桃每千克8.6元，淘气买了6千克苹果，2千克樱桃，他给了售货员50元，应找回多少钱？
<gadget id="calculator">2.5 * 6</gadget>
<output>15</output>

<gadget id="calculator">8.6 * 2</gadget>
<output>17.2</output>

<gadget id="calculator">50 - 15 - 17.2</gadget>
<output>17.8</output>

<result>17.8</result>