There are two kinds of tickets for a concert: 20 yuan and 30 yuan. The 30 yuan ticket has 100 seats, and the 20 yuan ticket has 250 seats. The box office revenue is 7,500 yuan. How many people are there at most?
一场音乐会的票价有20元、30元两种，30元的有100个座位，20元的有250个座位，票房收入是7500元，观众最多有多少人？
<gadget id="calculator">249 + 84</gadget>
<output>333</output>

<result>333</result>