10+12+14+16+18+20+22+24+26+28+30= how much.
10+12+14+16+18+20+22+24+26+28+30=多少．
<gadget id="calculator">10 + 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 + 30</gadget>
<output>220</output>

<result>220</result>