According to relevant research, when the indoor scenic spot is less than 1 square meter per person, and the outdoor scenic spot is less than 0.75 square meter per person, there will be a danger of stampede accidents. There is a trapezoidal outdoor venue with an upper base of 30 meters, a lower base of 50 meters, and a height of 60 meters in front of a scenic spot in an ancient town. To ensure safety, how many people can this venue accommodate at most at the same time?
根据相关研究，室内景点低于1平方米/人，室外景点低于0.75平方米/人时，就会有发生踩踏事故的危险．在一个古镇景点戏台前有一片上底是30米，下底是50米，高是60米的梯形室外场地．为保证安全，这片场地最多只能容纳多少人同时看戏？
<gadget id="calculator">30 + 50</gadget>
<output>80</output>

<gadget id="calculator">60 / 2 / 0.75</gadget>
<output>40</output>

<gadget id="calculator">80 * 40</gadget>
<output>3_200</output>

<result>3_200</result>