6 classes in the fifth grade of the school participated in the table tennis competition, and each class selected 3 male students and 2 female students. How many students participated in the competition?
学校五年级6个班参加乒乓球比赛，每班选3个男同学和2个女同学．参加比赛的一共有多少个同学．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>