2007*20062006-2006*20072007=how much.
2007*20062006-2006*20072007=多少．
<gadget id="calculator">2_007 * 20_062_006</gadget>
<output>40_264_446_042</output>

<gadget id="calculator">2_006 * 20_072_007</gadget>
<output>40_264_446_042</output>

<gadget id="calculator">40_264_446_042 - 40_264_446_042</gadget>
<output>0</output>

<result>0</result>