The ticket price of Century Park is: 10 yuan per person, if you buy 40 tickets at a time, you will get a 20% discount. When the number of people is less than 40, at least how many people must go to Century Park, and it is cheaper to buy 40 tickets? How many
世纪公园的票价是：每人10元，一次购票满40张，按八折优惠．当人数少于40人时，至少要有多少人去世纪公园，买40张票反而便宜？多少
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">10 * (4/5) * 4</gadget>
<output>32</output>

<gadget id="calculator">32 + 1</gadget>
<output>33</output>

<result>33</result>