On "Mother's Day", the flower shop sold 280 rose flowers and 360 lilies, and the carnations sold were twice the total number of roses and lilies. How many carnations are sold today?
"母亲节"那天，鲜花店卖出了280朵月季花，360朵百合，卖出的康乃馨是月季和百合总数的2倍．这天卖出康乃馨多少朵？
<gadget id="calculator">280 + 360</gadget>
<output>640</output>

<gadget id="calculator">640 * 2</gadget>
<output>1_280</output>

<result>1_280</result>