Xiaohua's mother bought 3 boxes of apples at 26 yuan each, and paid the salesperson 100 yuan. How much should I get back?
小华的妈妈买了3箱苹果，每箱26元，付给营业员100元，应找回多少元．
<gadget id="calculator">26 * 3</gadget>
<output>78</output>

<gadget id="calculator">100 - 78</gadget>
<output>22</output>

<result>22</result>