A story book has a total of 129 pages. Xiao Ming read 55 pages yesterday and 45 pages today. How many pages are left?
一本故事书一共129页，小明昨天看了55页，今天看了45页，还剩下多少页没有看？
<gadget id="calculator">129 - 55 - 45</gadget>
<output>29</output>

<result>29</result>