The Shanghai-Nanjing Expressway is about 300 kilometers long and 16 meters wide. How many hectares does this highway cover?
沪宁高速公路长约300千米，宽约16米，这条公路占地约多少公顷？
<gadget id="calculator">1 * 10_000</gadget>
<output>10_000</output>

<gadget id="calculator">16 / 10_000</gadget>
<output>1/625 = around 0.0016</output>

<gadget id="calculator">300 * 1_000 * (1/625)</gadget>
<output>480</output>

<result>480</result>