The students go boating. There are 60 female students, twice the number of male students. It is just right to take 9 boats. How many people can each boat take?
同学们去划船，女同学60人，是男同学人数的2倍，乘9条船正好，每条船可以坐多少人？
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">60 + 30</gadget>
<output>90</output>

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

<result>10</result>