2006*2007200720072007-2007*2006200620062006=how much.
2006*2007200720072007-2007*2006200620062006=多少．
<gadget id="calculator">2_006 * 2_007_200_720_072_007</gadget>
<output>4_026_444_644_464_446_042</output>

<gadget id="calculator">2_007 * 2_006_200_620_062_006</gadget>
<output>4_026_444_644_464_446_042</output>

<gadget id="calculator">4_026_444_644_464_446_042 - 4_026_444_644_464_446_042</gadget>
<output>0</output>

<result>0</result>