To number the pages of a book, there are 822 pages in total, how many times is the number "3" shared.
给一本书编页码，共有822页，其中数字"3"共用了多少次．
<gadget id="calculator">8 * 10</gadget>
<output>80</output>

<gadget id="calculator">80 + 80 + 100 + 2</gadget>
<output>262</output>

<result>262</result>