A total of 720 people participated in the school spring outing. A bus can carry 20 more people than a small bus, and 6 buses and 8 small buses can carry the same number of people. If all take passenger cars, how many cars are needed?
学校春游共有720人参加．一辆大客车比一辆小客车多载20人，6辆大客车和8辆小客车载的人数相等．如果都乘小客车，需要多少辆？
<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">720 / 60</gadget>
<output>12</output>

<result>12</result>