The school launched a large winter recess activities. (1/3) of the students in class 61 participated in the rope skipping competition, 25% of the students participated in the Bing Bing ball activity, and the remaining 20 students all played football. How many people are there in Class 61?
学校开展了冬季大课间活动．六一班有(1/3)的学生参加了跳绳比赛，25%的学生参加了兵兵球活动，剩下的20人全部踢足球．六一班一共有多少人？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">20 / (5/12)</gadget>
<output>48</output>

<result>48</result>