There are two kinds of ticket prices in a movie theater: 15.00 yuan per ticket with 600 seats, 20.00 yuan per ticket with 320 seats. If it is sold out, how much is the revenue per movie?
一家电影院的票价有两种：15.00元一张的有600个座位，20.00元一张的有320个座位．如果满座，每场电影收入是多少元？
<gadget id="calculator">15 * 600</gadget>
<output>9_000</output>

<gadget id="calculator">20 * 320</gadget>
<output>6_400</output>

<gadget id="calculator">9_000 + 6_400</gadget>
<output>15_400</output>

<result>15_400</result>