A sprinkler travels 200 meters per minute, and the sprinkler width is 5 meters. After driving for 40 minutes, how many hectares of road can it sprinkle?
一辆洒水车每分钟行200米，洒水宽度是5米，洒水车行驶了40分钟，能洒多少公顷的路面？
<gadget id="calculator">5 / 10_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">200 * 40 * (1/2_000)</gadget>
<output>4</output>

<result>4</result>