15 students participate in swimming competition, among them (3/5) are girls, how many girls are there?
15个同学参加游泳比赛，其中有(3/5)是女生，女生有多少人．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 * (3/5)</gadget>
<output>9</output>

<result>9</result>