999+998+997+1000+1003+1002+1001=how many.
999+998+997+1000+1003+1002+1001=多少．
<gadget id="calculator">999 + 998 + 997 + 1_000 + 1_003 + 1_002 + 1_001</gadget>
<output>7_000</output>

<result>7_000</result>