The school swimming team rents a car to go on a trip. There are 15 female students, and the number of male students is five times that of the female students. If a car can accommodate 9 people, how many cars do you need to rent at least?
学校游泳队租车去旅游，女同学15人，男同学的人数是女同学的5倍，如果一辆车的可乘人数为9人，那么至少需要租几辆车？
<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<gadget id="calculator">75 + 15</gadget>
<output>90</output>

<gadget id="calculator">90 / 9</gadget>
<output>10</output>

<result>10</result>