In the "Today's Education Cup" essay competition, 40 students in the sixth grade of our school won the first, second and third prizes. Among them, the number of people who won the third prize accounted for (5/8) of the number of winners in the sixth grade, and the ratio of the number of people who won the first and second prizes was 2:3. How many people in the sixth grade of our school won the first prize?
在"今日教育杯"征文比赛活动中，我校六年级有40人获一、二、三等奖．其中获三等奖的人数占六年级获奖人数的(5/8)，获一、二等奖的人数比是2：3．我校六年级有多少人获一等奖？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">40 * (5/8)</gadget>
<output>25</output>

<gadget id="calculator">40 - 25</gadget>
<output>15</output>

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

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

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>