On one side of the road, a tree is planted every 10 meters. How many kilometers did Li Hong run from the first tree to the 10th?
在公路的一边，每10米栽一棵树，李红从第一棵跑到第10棵，跑了多少千米？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">9 / 1_000</gadget>
<output>9/1_000 = around 0.009</output>

<gadget id="calculator">10 * (9/1_000)</gadget>
<output>9/100 = around 0.09</output>

<result>9/100 = around 0.09</result>