There is a road 50 meters long at the gate of the school. Trees are planted on both sides of the road from the beginning to the end. One tree is planted every 2 meters. How many trees should be planted in total?
校门口有一条路长50米，路的两边从头到尾都种上树，每隔2米种一棵，一共要种多少棵？
<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<gadget id="calculator">25 + 1</gadget>
<output>26</output>

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<result>52</result>