When x=2, y=1, what is the value of the formula 2x**2+4y**2
当x=2，y=1时，式子2x**2+4y**2的值是多少
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

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

<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<result>12</result>