|x+(1/3)|+(-y+2)**2=0, then xy=how much.
|x+(1/3)|+(-y+2)**2=0，则xy=多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">0 - (1/3)</gadget>
<output>-1/3 = around -0.333333</output>

<gadget id="calculator">(-1/3) ** 2</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>