The school organizes fifth and sixth graders to watch movies. There are 4 classes in fifth grade with 45 students in each class, and 3 classes in sixth grade with 54 students in each class. How many people in grades 5 and 6 went to the movies?
学校组织五、六年级学生观看电影，五年级4个班每班45人，六年级3个班，每班54人，五、六年级一共有多少人去看电影？
<gadget id="calculator">4 * 45</gadget>
<output>180</output>

<gadget id="calculator">3 * 54</gadget>
<output>162</output>

<gadget id="calculator">180 + 162</gadget>
<output>342</output>

<result>342</result>