There are 72 students in the sixth grade of a certain school participating in the ball game, and the number of people participating in the track and field competition is 25% less than the number participating in the ball game. How many people participate in the track and field competition?
某校六年级参加球类比赛的有72人，参加田径比赛的人数比参加球类比赛的人数少25%，参加田径比赛的有多少人？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">72 * (3/4)</gadget>
<output>54</output>

<result>54</result>