2011*20102010-2010*20112011=how much.
2011*20102010-2010*20112011=多少．
<gadget id="calculator">2_011 * 20_102_010</gadget>
<output>40_425_142_110</output>

<gadget id="calculator">2_010 * 20_112_011</gadget>
<output>40_425_142_110</output>

<gadget id="calculator">40_425_142_110 - 40_425_142_110</gadget>
<output>0</output>

<result>0</result>