A total of 6889 numbers are used to compile a dictionary. How many pages does this dictionary have?
编一本辞典一共用去了6889个数字，这本辞典共有几页？
<gadget id="calculator">1 * 9</gadget>
<output>9</output>

<gadget id="calculator">2 * 90</gadget>
<output>180</output>

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

<gadget id="calculator">6_889 - 9 - 180 - 2_700</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 / 4</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 + 999</gadget>
<output>1_999</output>

<result>1_999</result>