Define a new operation, ※ is the operation symbol, its meaning is: A*B=3A**2+A*B, then 2*5=how much.
定义一种新的运算，※是这种运算符号，它的意义是：A※B=3A**2+A*B，则2※5=多少．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

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

<gadget id="calculator">12 + 10</gadget>
<output>22</output>

<result>22</result>