There are 525 students, divided into three groups for activities, the first group (1/2) is the second group (1/3). (1/4) of the second group is (1/5) of the third group. How many people are there in the third group?
有525名同学，分为三组进行活动，第一组的(1/2)是第二组的(1/3)．第二组的(1/4)是第三组的(1/5)．问第三组有多少人？
<gadget id="calculator">8 + 12 + 15</gadget>
<output>35</output>

<gadget id="calculator">15 / 35</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">525 * (3/7)</gadget>
<output>225</output>

<result>225</result>