If the base of a triangle is 12 meters and three times its height, what is its area in hectares?
一个三角形的底是12米，是高的3倍，它的面积是多少公顷．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 / 10_000</gadget>
<output>3/1_250 = around 0.0024</output>

<result>3/1_250 = around 0.0024</result>