On Sunday Xiaohua went to Xinhua Bookstore to buy a Chinese dictionary and an English dictionary. A Chinese dictionary is 26.72 yuan, which is 13.44 yuan more expensive than an English dictionary. Xiaohua gave the salesperson 50 yuan, how much should I get back?
星期天小华去新华书店买了一本汉语词典和一本英语词典．一本汉语词典26.72元，比英语词典贵13.44元．小华给营业员50元钱，应找回多少钱？
<gadget id="calculator">26.72 - 13.44</gadget>
<output>13.28</output>

<gadget id="calculator">13.28 + 26.72</gadget>
<output>40</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<result>10</result>