The fourth-grade students of Yuhong Primary School went to visit the Garden Expo Garden in two batches. Each batch took 5 cars, and each car had exactly 45 people. How many students are there in the fourth grade of Yuhong Primary School?
育宏小学四年级学生分2批去参观园博园，每批乘坐5辆汽车，每辆汽车都正好坐45人．育宏小学四年级一共有多少人？
<gadget id="calculator">45 * 5 * 2</gadget>
<output>450</output>

<result>450</result>