55 students from class 1 of five years went to the park to play. The ticket office at the entrance of the park said "personal ticket 5 yuan, group ticket 20% off."
五年一班的55名同学去公园游玩，公园门口的售票处写着"个人票5元，团体票8折优惠"，这个班的同学怎样买票最合算，共需花多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 * (4/5) * 55</gadget>
<output>220</output>

<result>220</result>