There are 400 students participating in the mathematics competition, the number of winners accounts for 20% of the total number, and 60% of the number of winners are boys, how many of the total number of winners are girls.
有400名学生人参加数学竞赛，获奖人数占总人数的20%，而获奖人数中的60%是男生，获奖的女生占总人数的多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 400</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">400 * (1/5) * (1/1_000)</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>