There are 328 students in a certain elementary school to visit the Science and Technology Museum, 48 of them have already gone. How many minibuses are needed for every remaining 20 people taking one minibus?
某小学有328名同学去参观科技馆，已经去了48人．剩下的每20人乘一辆中巴车，需要多少辆中巴车？
<gadget id="calculator">328 - 48</gadget>
<output>280</output>

<gadget id="calculator">280 / 20</gadget>
<output>14</output>

<result>14</result>