A piece of triangular land has a base of 421 meters and a height of 58 meters. What is the approximate area of this land in hectares?
一块三角形土地，底是421米，高是58米，这块土地的面积大约是多少公顷？
<gadget id="calculator">24_418 / 2</gadget>
<output>12_209</output>

<gadget id="calculator">12_209 / 10_000</gadget>
<output>12_209/10_000 = around 1.2209</output>

<result>12_209/10_000 = around 1.2209</result>