There is a dictionary whose page numbers are composed of 3049 numbers. How many pages does this dictionary have?
有一本字典，它的页码由3049个数码组成的，这本字典共有多少页．
<gadget id="calculator">2 * 90</gadget>
<output>180</output>

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

<gadget id="calculator">3_049 - 9 - 180 - 2_700</gadget>
<output>160</output>

<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<gadget id="calculator">1_000 + 39</gadget>
<output>1_039</output>

<result>1_039</result>