Boys account for (4/9) in Class 6 1, so how many girls account for boys?
六1班中男生占(4/9)，则女生占男生的多少
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(5/9) / (4/9)</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>