When x=4, y=1.5, what is the value of 3x**2+4y
当x=4，y=1.5时，3x**2+4y的值为多少
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3 * 16</gadget>
<output>48</output>

<gadget id="calculator">4 * 1.5</gadget>
<output>6</output>

<gadget id="calculator">48 + 6</gadget>
<output>54</output>

<result>54</result>