In the first half of the year, the number of male workers in the textile factory was 1/4 of the number of female workers. In the second half of the year, the factory recruited 40 more male workers. At this time, the ratio of the number of male workers to the total number of employees in the factory was 5:20. How many female workers are there in the textile factory?
纺织厂上半年男工人数是女工人数的(1/4)，下半年工厂又招收了40名男工，这时男工人数与全厂职工数的比是5：20．纺织厂有女职工多少人？
<gadget id="calculator">5 / 20</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 40</gadget>
<output>10</output>

<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * (1/4)</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(1/16) - (1/4)</gadget>
<output>-3/16 = around -0.1875</output>

<gadget id="calculator">(1/4) + (-3/16)</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">30 / (1/16)</gadget>
<output>480</output>

<result>480</result>