When a=0.8, b=6, how much is a**2+2b=.
当a=0.8，b=6时，a**2+2b=多少．
<gadget id="calculator">0.8 ** 2</gadget>
<output>0.64</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">0.64 + 12</gadget>
<output>12.64</output>

<result>12.64</result>