What is the sum of the negative number whose square is equal to 16 and the cube is equal to -(8/27).
平方等于16的负数与立方等于-(8/27)的和是多少．
<gadget id="calculator">14 / 3</gadget>
<output>14/3 = around 4.666667</output>

<result>14/3 = around 4.666667</result>