There are 52 students in Class 1 of June. In an activity class, the head teacher said, "Male students choose (1/4), and female students also choose (1/4) to participate in the tug-of-war competition." So how many students participated in the tug-of-war competition this time?
六1班有52人，一次活动课上，班主任说"男同学选(1/4)，女同学也选(1/4)，参加拔河比赛"那么这次有多少个同学参加拔河比赛．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">52 * (1/4)</gadget>
<output>13</output>

<gadget id="calculator">13 + 13</gadget>
<output>26</output>

<result>26</result>