395 students from the fifth grade of Chengguan Primary School went to visit the Agricultural Science and Technology Demonstration Park, and 35 of them have already gone. How many minibuses are needed for every remaining 20 people taking one minibus?
城关小学五年级的395名同学去参观农业科技示范园，已经去了35人．剩下的每20人乘一辆中巴车，需要多少辆中巴车？
<gadget id="calculator">395 - 35</gadget>
<output>360</output>

<gadget id="calculator">360 / 20</gadget>
<output>18</output>

<result>18</result>