The third grade students participated in the tree planting activity. There are 5 classes in total. Each class is divided into 5 groups, with an average of 14 people in each group. How many people attended the event in total?
三年级同学参加植树活动，一共5个班，每班分5组，平均每组有14人．一共有多少人参加活动？
<gadget id="calculator">5 * 5 * 14</gadget>
<output>350</output>

<result>350</result>