There are 150 students in the sixth grade of Wenming Primary School, and (1/6) students should be selected to participate in the mathematics competition. Among them, female students account for (2/5), how many girls are there in the competition?
文明小学六年级有150人，要选出(1/6)的学生参加数学竞赛．其中女同学占(2/5)，参赛的女生有多少人．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">150 * (1/6) * (2/5)</gadget>
<output>10</output>

<result>10</result>