Yucai Primary School has 6 grades, each grade has 7 classes, and each class has about 40 students. Approximately how many students are there in the school.
育才小学有6个年级，每个年级有7个班，每班大约有40人．全校大约共有学生多少人．
<gadget id="calculator">6 * 7 * 40</gadget>
<output>1_680</output>

<result>1_680</result>