There are 180 workers in a certain workshop, and the number of female workers (2/5) and the number of male workers (1/4) are known to be 60 in total. How many female workers are there in this workshop?
某车间有工人180名，已知女工人数的(2/5)和男工人数的(1/4)共60人，该车间有女工多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">180 * (1/4)</gadget>
<output>45</output>

<gadget id="calculator">60 - 45</gadget>
<output>15</output>

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

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">15 / (3/20)</gadget>
<output>100</output>

<result>100</result>