Plant poplar trees (cut at both ends) on both sides of a road with a length of 280m, and plant one tree every 5m. How many poplar trees will be planted in total?
在一条长为280m的公路两旁栽杨树(两端都裁)，每隔5m栽一棵．一共要栽多少棵杨树？
<gadget id="calculator">280 / 5</gadget>
<output>56</output>

<gadget id="calculator">56 + 1</gadget>
<output>57</output>

<gadget id="calculator">57 * 2</gadget>
<output>114</output>

<result>114</result>