Mom bought 6 kilograms of apples in the supermarket, 2.2 yuan per kilogram of apples, and paid 50 yuan to the salesperson. How much should I get back?
妈妈在超市买了6千克苹果，每千克苹果2.2元，付给售货员50元，应找回多少元？
<gadget id="calculator">2.2 * 6</gadget>
<output>13.2</output>

<gadget id="calculator">50 - 13.2</gadget>
<output>36.8</output>

<result>36.8</result>