There are 38 students in each class of the third and fourth grades of Siyuan Experimental School, and each grade has 6 classes. How many students are there in the two grades?
思源实验学校三、四年级每班有38人，每个年级都有6个班，两个年级共有多少人？
<gadget id="calculator">38 * 2 * 6</gadget>
<output>456</output>

<result>456</result>