A factory has 280 workers, and female workers are 40% less than male workers. How many female workers are there?
某厂有职工280人，女工比男工少40%．女工有多少人？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">280 / (8/5)</gadget>
<output>175</output>

<gadget id="calculator">280 - 175</gadget>
<output>105</output>

<result>105</result>