Gaoshan Elementary School holds a sports meeting. There are 12 people participating in long-distance running, twice as many people participating in sprinting as long-distance running, and 3/8 people participating in high jump (3/8). How many people participated in high jump?
高山小学召开运动会，参加长跑的有12人，参加短跑的人数是长跑人数的2倍，参加跳高的人数是短跑人数的(3/8)，参加跳高的有多少人？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">12 * 2 * (3/8)</gadget>
<output>9</output>

<result>9</result>