There are 30 classes in Hope Primary School, with an average of 40 students in each class. At the end of the term, half of the students will win prizes. How many people will win prizes?
希望小学有30个班，平均每班40人，期末有一半的人获奖，获奖的人数多少人
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<result>600</result>