There are two kinds of ticket prices in a movie theater: 600 seats for 3 yuan a ticket, 320 seats for 4 yuan a movie theater. If all seats are sold out, how much is the revenue per show?
一个电影院的票价有两种：3元一张的有600个座位，4元一张的有320个座位．如果满座，每场收入是多少元？
<gadget id="calculator">3 * 600</gadget>
<output>1_800</output>

<gadget id="calculator">4 * 320</gadget>
<output>1_280</output>

<gadget id="calculator">1_800 + 1_280</gadget>
<output>3_080</output>

<result>3_080</result>