When a=3, b=4, what is the value of a**2+2b
当a=3，b=4时，a**2+2b的值是多少
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">9 + 8</gadget>
<output>17</output>

<result>17</result>