In class 63, if the number of girls accounts for (4/5) of the number of boys, then the number of boys accounts for ((())/(())) of the whole class.
六3班，女生人数占男生人数的(4/5)，那么男生人数占全班人数的((())/(()))．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">1 / (9/5)</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>