Given m=0.6, n=0.4, find the value of m**2+n**2.
已知m=0.6，n=0.4，求m**2+n**2的值．
<gadget id="calculator">0.6 ** 2</gadget>
<output>0.36</output>

<gadget id="calculator">0.4 ** 2</gadget>
<output>0.16</output>

<gadget id="calculator">0.36 + 0.16</gadget>
<output>0.52</output>

<result>0.52</result>