Plant trees on both sides of a newly built road with a length of 2.5 kilometers. Trees must be planted at both ends, and the distance between two adjacent trees is 5 meters. How many trees can be planted in total.
给一条长2.5千米的新建公路两边植树，两头都要植树，相邻两棵间隔5米．一共能植多少棵树．
<gadget id="calculator">2.5 * 1_000</gadget>
<output>2_500</output>

<gadget id="calculator">2_500 / 5</gadget>
<output>500</output>

<gadget id="calculator">500 + 1</gadget>
<output>501</output>

<gadget id="calculator">501 * 2</gadget>
<output>1_002</output>

<result>1_002</result>