20062006*20062005-20062007*20062004=how many.
20062006*20062005-20062007*20062004=多少．
<gadget id="calculator">20_062_006 * 20_062_005</gadget>
<output>402_484_064_682_030</output>

<gadget id="calculator">20_062_007 * 20_062_004</gadget>
<output>402_484_064_682_028</output>

<gadget id="calculator">402_484_064_682_030 - 402_484_064_682_028</gadget>
<output>2</output>

<result>2</result>