There are 5 classes in the third grade, 42 students in each class, and they have to take 7 cars to visit the Science and Technology Museum. If the number of people in each car is the same, how many people should each car take?
三年级有5个班，每班42人，要乘7辆车去参观科技馆．如果每辆车的人数相同，每辆车应坐多少人？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">42 * (5/7)</gadget>
<output>30</output>

<result>30</result>