Students go on an autumn outing, each car can hold 55 people, the first nine cars are all full, and the tenth car has 15 vacancies left, how many people are there in total for the autumn outing?
同学们去秋游，每辆车可乘55人，前9辆车全部乘满，第10辆还剩下15个空位，一共有多少人去秋游？
<gadget id="calculator">55 * 10</gadget>
<output>550</output>

<gadget id="calculator">550 - 15</gadget>
<output>535</output>

<result>535</result>