Our school held a writing and reading competition, and the first and second prizes were selected according to the ratio of 2:3. There are 10 students who won the first prize, and how many students won the second prize.
我校举行书写阅读比赛，按2：3的比例评出一、二等奖，获一等奖有10名学生，获二等奖有多少名．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>