The school held a "Karaoke" competition for elementary school students, and the first and second prizes were awarded to the finalists in the ratio of 2:3. If there are 21 players who won the second prize, how many players won the first prize?
学校举行小学生"卡拉OK"比赛，对进入决赛的选手按2：3的比例评出一、二等奖．如果获二等奖的有21名选手，获一等奖的选手有多少名？
<gadget id="calculator">21 / 3</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>