There are 20 female workers in a workshop, accounting for 1/4 of the total number of workers in the workshop, and 20 more female workers are added. At this time, how many female workers account for the total number of workers in the workshop?
某车间女工有20人，占车间人数的(1/4)，又增加女工20人，这时女工占全车间人数的多少．
<gadget id="calculator">20 + 20</gadget>
<output>40</output>

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

<gadget id="calculator">20 / (1/4)</gadget>
<output>80</output>

<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>