A 0.25-hectare cotton field forms a triangle, and its base is measured to be 125 meters. How tall is it?
一块0.25公顷的棉田成三角形，量得它的底是125米．它的高是多少？
<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>