A total of 40 students in the fifth grade participated in gymnastics training, of which boys accounted for (2/5), how many boys participated in gymnastics training?
五年级共有40位同学参加体操训练，其中男生占了(2/5)，有多少名男生参加了体操训练？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 * (2/5)</gadget>
<output>16</output>

<result>16</result>