There is a road with a total length of 2,700 meters from east to west, and a tree is planted every 9 meters from east to west (from beginning to end) on both sides of the road. How many trees are planted in total?
有一条从东到西全长2700米的公路，在公路两旁由东到西(从头到尾)每隔9米栽一棵树，一共栽树多少棵．
<gadget id="calculator">2_700 / 9</gadget>
<output>300</output>

<gadget id="calculator">300 + 1</gadget>
<output>301</output>

<gadget id="calculator">301 * 2</gadget>
<output>602</output>

<result>602</result>