The teacher assigned 12 math problems, and Xiaohong did (2/3), how much of it was left?
老师布置了12道数学题，小红做了(2/3)，还剩几分之几没做？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>