A city builds a green belt with a length of 8 kilometers and a width of 200 meters in the urban area. If it costs 5,000 yuan per hectare of greening, how much is the total investment?
一座城市在市区建一个长8千米、宽200米的绿化带，如果每公顷绿化要投资5000元，一共要投资多少元？
<gadget id="calculator">200 / 10_000</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">5_000 * 8 * 1_000 * (1/50)</gadget>
<output>800_000</output>

<result>800_000</result>