There are 98 pages in a story book, and you read x pages every day on average, and after reading it for 5 days, how many pages are left.
一本故事书有98页，平均每天看x页，看了5天，还剩多少页．
<gadget id="calculator">98 - 5</gadget>
<output>93</output>

<result>93</result>