The greening workers need to plant magnolias on both sides of a 240-meter-long road, at both ends, and every two magnolias are separated by 3 meters. How many magnolia trees will be planted in total?
绿化工人要在一条长240米的公路两侧种白玉兰，两端都种，每两棵白玉兰相隔3米．一共要栽多少棵白玉兰？
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 + 1</gadget>
<output>81</output>

<gadget id="calculator">81 * 2</gadget>
<output>162</output>

<result>162</result>