There are 48 male workers in a factory, accounting for 80% of the total number of workers in the factory. After transferring a few female workers, the female workers accounted for 25% of the total number of workers in the factory. How many female workers were transferred?
某工厂男工有48人，占全厂人数的80%，调人几名女工后，女工占全厂人数的25%，调入女工多少人？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">48 / (3/4)</gadget>
<output>64</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">48 / (4/5)</gadget>
<output>60</output>

<gadget id="calculator">64 - 60</gadget>
<output>4</output>

<result>4</result>