Tickets for the Star Zoo are 100 yuan for adults and 50 yuan for children. On Children’s Day, children’s tickets are free. In this way, the number of adults entering the park increased by 60% compared with the previous day, and the number of children entering the park increased by 80%. There are 780 people, but the ticket income of this day is the same as that of the previous day, so how much is the ticket income of Star Zoo on June 1st?
明星动物园的门票，大人100元，儿童50元，六一儿童节这天，儿童门票免费，这样大人入园者比前一天增加了60%，儿童入园者增加了80%，结果共增加了780人，但这天门票收入和前一天收入相同，那么六一这天明星动物园的门票收入是多少元．
<gadget id="calculator">0.6 + 0.96</gadget>
<output>1.56</output>

<gadget id="calculator">780 / 1.56</gadget>
<output>500</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">500 * (8/5) * 100</gadget>
<output>80_000</output>

<result>80_000</result>