The students participated in the summer camp activities by boat, and all lived in the fourth-class cabin; the fourth-class cabin has 15 rooms, each with 12 beds. After all 13 rooms are occupied, there are 5 people left. How many people will participate in the summer camp activities?
同学们乘船参加夏令营活动，全部住四等舱；四等舱有15个房间，每间12个床位．住满了13个房间后，还剩5人，共有多少人参加夏令营活动？
<gadget id="calculator">12 * 13</gadget>
<output>156</output>

<gadget id="calculator">156 + 5</gadget>
<output>161</output>

<result>161</result>