There are 20 seats in the first row of a theater, 2 more seats in the last row than the previous row, and 72 seats in the last row. How many seats are there in total in this theater?
某剧院第一排有20个座位，后一排都比前一排多2个座位，最后一排有72个座位，这个剧院共有多少个座位？
<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">2 * 19</gadget>
<output>38</output>

<gadget id="calculator">72 - 38</gadget>
<output>34</output>

<gadget id="calculator">72 + 34</gadget>
<output>106</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">106 * 10</gadget>
<output>1_060</output>

<result>1_060</result>