The cinema has 850 seats. There will be a concert on New Year's Day. 50 yuan per ticket. After selling 673 copies. The remaining tickets with slightly worse positions will be sold at a reduced price of 10 yuan each. How much did the concert earn in total?
电影院有850个座位．元旦要举行一场音乐会．每张票50元．售出673张后．剩下一些位置稍差的票每张降价10元出售．这场音乐会一共收入多少元？
<gadget id="calculator">50 * 673</gadget>
<output>33_650</output>

<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">850 - 673</gadget>
<output>177</output>

<gadget id="calculator">40 * 177</gadget>
<output>7_080</output>

<gadget id="calculator">33_650 + 7_080</gadget>
<output>40_730</output>

<result>40_730</result>