99+198+297+396+495+594+693+792+891+990=how many.
99+198+297+396+495+594+693+792+891+990=多少．
<gadget id="calculator">99 + 198 + 297 + 396 + 495 + 594 + 693 + 792 + 891 + 990</gadget>
<output>5_445</output>

<result>5_445</result>