New movies are showing in the cinema. All 2,000 tickets in the theater are sold out. The front row seats are priced at 12 yuan each, and the back row seats are 9 yuan each. The total income from the front row tickets is 3,300 yuan less than that of the back row seats.
电影院里上映新电影．电影院的2000张票全部售空，前排座位票价每张12元，后排每张9元，前排票价总收入比后排少3300元，问该影院前排座位有多少？
<gadget id="calculator">2_000 * 9</gadget>
<output>18_000</output>

<gadget id="calculator">18_000 - 3_300</gadget>
<output>14_700</output>

<gadget id="calculator">9 + 12</gadget>
<output>21</output>

<gadget id="calculator">14_700 / 21</gadget>
<output>700</output>

<result>700</result>