A rectangular airport runway with a length of 3500 meters and a width of 130 meters, how many hectares does this runway cover?
一个长3500米，宽130米的长方形机场跑道，这条跑道占地多少公顷？
<gadget id="calculator">3_500 * 130</gadget>
<output>455_000</output>

<gadget id="calculator">455_000 / 10_000</gadget>
<output>91/2 = around 45.5</output>

<result>91/2 = around 45.5</result>