Xiaoying read a 72-page story book. I read 26 pages on the first day and 28 pages on the second day, how many more pages do I need to read?
小英看一本72页的故事书．第一天看了26页，第二天看了28页，再看多少页才能看完？
<gadget id="calculator">72 - 26 - 28</gadget>
<output>18</output>

<result>18</result>