A 298-page story book, I read 78 pages on the first day and 122 pages on the second day, how many pages are left?
一本298页的故事书，我第一天读了78页，第二天读了122页，还剩多少页没读？
<gadget id="calculator">78 + 122</gadget>
<output>200</output>

<gadget id="calculator">298 - 200</gadget>
<output>98</output>

<result>98</result>