There are 125 students in the fifth grade of Hongxing Primary School, of which (2/5) have participated in the calligraphy club, and (1/2) the number of students participating in the martial arts club. How many students have joined the martial arts club?
红星小学五年级有学生125人，其中的(2/5)参加了书法社团，参加武术社团的人数是书法社团的(1/2)，参加武术社团的学生有多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">125 * (2/5) * (1/2)</gadget>
<output>25</output>

<result>25</result>