2002*20032003-2003*20022002.
2002*20032003-2003*20022002．
<gadget id="calculator">2_003 * 10_001</gadget>
<output>20_032_003</output>

<gadget id="calculator">2_002 * 20_032_003</gadget>
<output>40_104_070_006</output>

<gadget id="calculator">2_003 * 20_022_002</gadget>
<output>40_104_070_006</output>

<gadget id="calculator">40_104_070_006 - 40_104_070_006</gadget>
<output>0</output>

<result>0</result>