Plant poplar trees on both sides of a road that is 4 kilometers long, and plant one tree every 8 meters. How many trees can be planted at most?
在一条长4千米的公路两旁栽杨树，每隔8米栽一棵，最多可以栽几棵？
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 / 8</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>