The school-based textbook "Phoenix Mountain Beauty, Phoenix Fruit Fragrance" compiled by Banyue Town Central Primary School has been affirmed by the superior and promoted. Now it is necessary to number the pages of the book. Teacher Zhang entrusts Li Ziqi and other students with the task. As a result, they used a total of 723 numbers when writing page numbers. Please tell us how many pages this book has.
半月镇中心小学组织编写的校本教材《凤凰山美，凤凰果香》受到了上级肯定并予以推广，现要给该书编页码，张老师将任务交给李子奇等几个同学．结果他们在编写页码时一共用了723个数字．请你告诉我们这本书共有多少页．
<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<gadget id="calculator">723 - 9 - 180</gadget>
<output>534</output>

<gadget id="calculator">534 / 3</gadget>
<output>178</output>

<gadget id="calculator">9 + 90 + 178</gadget>
<output>277</output>

<result>277</result>