In a mathematics competition, a total of 87 people won the first, second and third prizes. Among them, the ratio of the number of people who won the first prize to the second prize is 2:3, the students who won the third prize accounted for one, and the total number of people who won the second prize (14/15), how many students won the first prize?
在一次数学竞赛中，获一，二、三等奖共有87人．其中获一等奖和二等奖的人数比是2：3，获三等奖的同学占一，二等奖总人数的(14/15)，获一等奖的同学有多少人？
<gadget id="calculator">15 + 14</gadget>
<output>29</output>

<gadget id="calculator">15 / 29</gadget>
<output>15/29 = around 0.517241</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">87 * (15/29) * (2/5)</gadget>
<output>18</output>

<result>18</result>