The number of people participating in track and field competitions is 54, which is 25% less than the number of people participating in ball games. 25% fewer people participated in ball games. How many people participate in ball games?
参加田径比赛的人数有54人，比参加球类比赛的人数少25%．参加球类比赛的人数少25%．参加球类比赛的有多少？
<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">54 / (3/4)</gadget>
<output>72</output>

<result>72</result>