Calculation: 1001*1001-1001=how much.
计算：1001*1001-1001=多少．
<gadget id="calculator">1_001 * 1_001</gadget>
<output>1_002_001</output>

<gadget id="calculator">1_002_001 - 1_001</gadget>
<output>1_001_000</output>

<result>1_001_000</result>