The number of male workers in a textile factory is 1/4 of the number of female workers, and the number of male workers is equal to the total number of workers in the factory.
纺织厂里男工人数是女工人数的(1/4)，男工人数是全厂人数的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/4) / (5/4)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>