A book has 60 pages. Xiaoxin read 13 pages for the first time, and 9 pages for the second time. How many pages are left?
一本书有60页，小新第一次看了13页，第二次看了9页，还剩多少页没有看．
<gadget id="calculator">60 - 13 - 9</gadget>
<output>38</output>

<result>38</result>