A book has 456 pages, how many numbers are used in the page number of this book?
一本书共有456页，在这本书的页码中共用了多少个数字．
<gadget id="calculator">2 * 90</gadget>
<output>180</output>

<gadget id="calculator">456 - 100</gadget>
<output>356</output>

<gadget id="calculator">356 + 1</gadget>
<output>357</output>

<gadget id="calculator">3 * 357</gadget>
<output>1_071</output>

<gadget id="calculator">9 + 180 + 1_071</gadget>
<output>1_260</output>

<result>1_260</result>