When x=2, y=18, what is 3x**2+y=
当x=2，y=18时，3x**2+y=多少
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

<gadget id="calculator">12 + 18</gadget>
<output>30</output>

<result>30</result>