It is hoped that 438 students in the fourth grade of elementary school will go to visit extracurricular practical activities. 48 of them have already gone, and the remaining 30 students will take a car. How many cars do they need?
希望小学四年级的438名同学去参观课外实践活动，已经去了48人，剩下的每30人乘一辆车，需要多少辆车？
<gadget id="calculator">438 - 48</gadget>
<output>390</output>

<gadget id="calculator">390 / 30</gadget>
<output>13</output>

<result>13</result>