There are 128 students in the sixth grade of Xinguang Primary School, among whom (5/8) have "reached the standard", and (2/5) of the students who have "reached the standard" are girls.
新光小学六年级有128人，已经"达标"的占(5/8)，而"达标"的学生的(2/5)是女生，"达标"的男生占六年级人数的几分之几？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">2 / 5</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">(5/8) * (3/5)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>