There is a tree every 10m beside the road. Xiao Ming counts from the first tree on the car to the 265th tree. After exactly 3 minutes, what is the speed of the car in km per hour?
公路旁每隔10m有一棵树，小明在汽车上从第一棵树数起，数到第265棵为止，恰好过了3分钟，汽车每小时的速度是多少km．
<gadget id="calculator">265 - 1</gadget>
<output>264</output>

<gadget id="calculator">3 / 60</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">10 / (1/20) / 1_000</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">264 * (1/5)</gadget>
<output>264/5 = around 52.8</output>

<result>264/5 = around 52.8</result>