The whole class of 36 people went to "Xianjing Park" to play. The "Ticket Purchase Instructions" at the entrance of the park reads: "Every person enters the gate with a ticket: children's tickets are 8 yuan each, and group purchases (40 or more) can enjoy a (1/5) discount for each ticket." Count, how to buy tickets the most cost-effective? How much less can you pay when you buy?
全班36人去"仙景公园"游玩．公园门口的"购票须知"写道："每人凭票进门：儿童票每张8元，团体购票(40及40人以上)每张可以享受(1/5)的优惠．"算一算，怎样购买门票最合算？买时可以少付多少钱？
<gadget id="calculator">8 * 36</gadget>
<output>288</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">8 * 40 * (4/5)</gadget>
<output>256</output>

<gadget id="calculator">288 - 256</gadget>
<output>32</output>

<result>32</result>