36 people from Class 1 of June went to the Children's Paradise to play. Ticket purchase instructions: visitors enter the park with tickets. Children's ticket: 8 yuan/person; group ticket: group tickets can be purchased for more than 40 people, and each person is discounted (1/5). How to buy the most cost-effective tickets? Please write down your thought process.
六1班36人去儿童乐园游玩，购票须知：游人凭票入园．儿童票：8元/人；团体票：满40人可购买团体票，每人优惠(1/5)．怎样购买门票最合算？请写出你的思考过程．
<result>40</result>