Define x☆y=3x+7y. (1☆1)+(2☆2)+(3☆3)+...+(10☆10)=how much.
定义x☆y=3x+7y．(1☆1)+(2☆2)+(3☆3)+…+(10☆10)=多少．
<gadget id="calculator">1 + 10</gadget>
<output>11</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">10 * 11 * 5</gadget>
<output>550</output>

<result>550</result>