The duration of a class is (2/3) hours, the teacher spends (1/4) hour on the lecture, the students spend (1/3) hour on exploration and practical activities, and the rest is the students’ independent homework time. How many hours do the students work independently?
一节课的时间是(2/3)小时，老师讲课用了(1/4)小时，同学们用于探索、实践活动的时间是(1/3)小时，剩下的是同学们独立作业的时间．同学们独立作业的时间是多少小时？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/3) - (1/4) - (1/3)</gadget>
<output>1/12 = around 0.083333</output>

<result>1/12 = around 0.083333</result>