There are more boys than girls in class 6 and 4 (1/6), so how much less girls than boys?
六4班男生比女生多(1/6)，那箩么女生比男生少多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">(1/6) / (7/6)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>