Mingming read a storybook with 447 pages in total, 135 pages in the first week and 265 pages in the second week. How many pages are left unread?
明明读一本故事书，共有447页，第一周读了135页，第二周读了265页．还剩多少页没读？
<gadget id="calculator">447 - 135 - 265</gadget>
<output>47</output>

<result>47</result>