In a mathematics competition, there were 120 people who won the third prize, the second prize was the third prize (2/3), the first prize was the second prize (1/4), and the second prize was the second prize (1/4). How many people are there for the first prize?
在一次数学竞赛中，获三等奖的有120人，获二等奖的是获三等奖的(2/3)，获一等奖的是获二等奖的(1/4)，获一等奖的有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 * (2/3) * (1/4)</gadget>
<output>20</output>

<result>20</result>