There are more boys than girls in Class 6 (1/4), and how many girls account for the whole class.
六2班男生比女生多(1/4)，女生占全班人数的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4) + 1</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">1 / (9/4)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>