On both sides of a 255-meter road, one tree is planted every 5 meters (both ends are planted), how many trees should be planted in total?
在255米道路的两旁，每隔5米种一棵树(两端都种)，一共要种多少棵？
<gadget id="calculator">255 / 5</gadget>
<output>51</output>

<gadget id="calculator">51 + 1</gadget>
<output>52</output>

<gadget id="calculator">52 * 2</gadget>
<output>104</output>

<result>104</result>