Girls are less than boys (1/6), and boys are much more than girls.
女生比男生少(1/6)，男生比女生多多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(1/6) / (5/6)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>