A book of fairy tales has 60 pages, and a book of stories is 15 pages less than three times the number of pages in a book of fairy tales. How many pages are there in this book of stories?
一本童话书有60页，一本故事书是童话书页数的3倍少15页，这本故事书有多少页？
<gadget id="calculator">60 * 3</gadget>
<output>180</output>

<gadget id="calculator">180 - 15</gadget>
<output>165</output>

<result>165</result>