27 people go to a certain place by car. There are two kinds of vehicles available for rent. Type A car can take 8 people, and the rent is 300 yuan/day; type B car can take 4 people, and the rent is 200 yuan/day. The cheapest way to rent a car.
27人乘车去某地，可供租的车辆有两种，A种车可乘8人，租金300元/天；B种车可乘4人，租金200元/天，选择多少A+B种租车方式最便宜．
<result>3</result>