At 12 o'clock, the minute hand and the hour hand point exactly opposite (expressed in fractions).
12时多少分，分针和时针指向刚好相反(用分数表示)．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 - (1/12)</gadget>
<output>11/12 = around 0.916667</output>

<gadget id="calculator">30 / (11/12)</gadget>
<output>360/11 = around 32.727273</output>

<result>360/11 = around 32.727273</result>