Lingling reads a 70-page book. On the first day, she starts from the first page, then she reads 18 pages, on the second day she reads 10 pages, and on the third day she reads from the first page.
玲玲看一本70页的书，第一天从第一页看起，看了18页，第二天看了10页，第三天从第多少页看起．
<gadget id="calculator">18 + 10 + 1</gadget>
<output>29</output>

<result>29</result>