20062007*2007-2006*20072007=how many.
20062007*2007-2006*20072007=多少．
<gadget id="calculator">20_062_007 * 2_007</gadget>
<output>40_264_448_049</output>

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

<gadget id="calculator">40_264_448_049 - 40_264_446_042</gadget>
<output>2_007</output>

<result>2_007</result>