The concert hall has 400 seats, and the ticket price is 25 yuan per ticket. After 260 tickets are sold, the remaining tickets are all sold out at 20 yuan per ticket. How much money does the concert hall earn in total?
音乐厅有400个座位，票价为25元/张，在售出260张票后，剩下的票按20元/张全部售完，音乐厅一共收入多少钱？
<gadget id="calculator">25 * 260</gadget>
<output>6_500</output>

<gadget id="calculator">400 - 260</gadget>
<output>140</output>

<gadget id="calculator">20 * 140</gadget>
<output>2_800</output>

<gadget id="calculator">6_500 + 2_800</gadget>
<output>9_300</output>

<result>9_300</result>