There were originally 30 rope skipping students on the playground, and another 15 people joined in. The number of running students is 5 times that of skipping rope. How many students are running?
操场上跳绳同学原有30人，又有15人加入．跑步同学是跳绳人数的5倍，参加跑步的同学有多少人？
<gadget id="calculator">30 + 15</gadget>
<output>45</output>

<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<result>225</result>