Simplify first and then evaluate: when x=4, find the value of 4x**2+4x*4.
先化简再求值：当x=4的时候，求4x**2+4x*4的值．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">4 * 16</gadget>
<output>64</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">64 + 64</gadget>
<output>128</output>

<result>128</result>