During the exercise time between classes, there are 30 people in Class 51 doing activities, which is 1/9 of the total number of people participating in the activities on campus. How many people participate in the activities on campus?
课间操时间，五1班有30人进行活动，是校园里参加活动总人数的(1/9)，校园有多少人参加活动？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">30 / (1/9)</gadget>
<output>270</output>

<result>270</result>