In 167*□/3*4-1=2003, how much should be filled in □.
在167*□/3*4-1=2003中，□内应填多少．
<gadget id="calculator">1 + 2_003</gadget>
<output>2_004</output>

<gadget id="calculator">167 / 3</gadget>
<output>167/3 = around 55.666667</output>

<gadget id="calculator">(167/3) * 4</gadget>
<output>668/3 = around 222.666667</output>

<gadget id="calculator">2_004 / (668/3)</gadget>
<output>9</output>

<result>9</result>