A piece of 0.25 hectare triangular site, its base is 125 meters, what is its height in meters?
一块0.25公顷的三角形场地，量得它的底是125米，它的高是多少米．
<gadget id="calculator">0.25 * 10_000</gadget>
<output>2_500</output>

<gadget id="calculator">2 / 125</gadget>
<output>2/125 = around 0.016</output>

<gadget id="calculator">2_500 * (2/125)</gadget>
<output>40</output>

<result>40</result>