A road is 2,800 meters long and 30 meters wide. How many hectares does this road cover?
一条公路长2800米，宽30米，这条公路占地面积约是几公顷？
<gadget id="calculator">2_800 * 30</gadget>
<output>84_000</output>

<gadget id="calculator">84_000 / 10_000</gadget>
<output>42/5 = around 8.4</output>

<result>42/5 = around 8.4</result>