The students participated in the tree planting activity. 96 students went to the fourth grade, and 18 people went to the fifth grade, twice as many as the fourth grade. How many people from the fourth and fifth grades went to participate in the tree planting activity?
同学们参加植树活动．四年级去了96人，五年级去的人数比四年级的2倍少18人．四、五年级一共去了多少人参加植树活动？
<gadget id="calculator">96 * 2</gadget>
<output>192</output>

<gadget id="calculator">192 - 18</gadget>
<output>174</output>

<gadget id="calculator">174 + 96</gadget>
<output>270</output>

<result>270</result>