2009*20082008-2008*20092009=how many.
2009*20082008-2008*20092009=多少．
<gadget id="calculator">2_009 * 20_082_008</gadget>
<output>40_344_754_072</output>

<gadget id="calculator">2_008 * 20_092_009</gadget>
<output>40_344_754_072</output>

<gadget id="calculator">40_344_754_072 - 40_344_754_072</gadget>
<output>0</output>

<result>0</result>