(oral calculation) 4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36.
(口算)4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36．
<gadget id="calculator">4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 + 30 + 32 + 34 + 36</gadget>
<output>340</output>

<result>340</result>