certain toll station charges tolls for passing vehicles: RMB 30 for buses, RMB 15 for minibuses, and RMB 10 for small cars. The ratio of the number of buses, minibuses and cars passing through the toll booth on a certain day is 10:12:33, and the toll charged for minibuses on this day is 1050 yuan less than that for cars. How many cars pass through the toll booth on this day?
某收费站对过往车辆通行费的收费标准是：大客车30元、中巴车15元、小轿车10元．某一天通过该收费站的大客车、中巴车和小轿车的数量之比是10：12：33，这一天收取的中巴车的通行费比小轿车的通行费少1050元．这一天通过该收费站的小轿车有多少辆？
<gadget id="calculator">10 * 33</gadget>
<output>330</output>

<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<gadget id="calculator">330 - 180</gadget>
<output>150</output>

<gadget id="calculator">1_050 / 150</gadget>
<output>7</output>

<gadget id="calculator">33 * 7</gadget>
<output>231</output>

<result>231</result>