Ten students from the fifth grade environmental protection team planted trees every 25 meters on both sides of a 2-kilometer-long runway. How many trees were planted on this road?
五年级环保小组的10名同学在一条2千米长的跑道两边每隔25米分别植树一棵，这段公路共植树多少棵．
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 25</gadget>
<output>80</output>

<gadget id="calculator">80 + 1</gadget>
<output>81</output>

<gadget id="calculator">81 * 2</gadget>
<output>162</output>

<result>162</result>