There are 3829 numbers in the page numbering of a student dictionary. How many pages does this dictionary have?
排一本学生词典的页码，共用了3829个数字，问这本词典共有几页？
<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<gadget id="calculator">900 * 3</gadget>
<output>2_700</output>

<gadget id="calculator">9 + 180 + 2_700</gadget>
<output>2_889</output>

<gadget id="calculator">3_829 - 2_889</gadget>
<output>940</output>

<gadget id="calculator">940 / 4</gadget>
<output>235</output>

<gadget id="calculator">999 + 235</gadget>
<output>1_234</output>

<result>1_234</result>