There is a triangular cotton field of 0.0045 hectares, whose bottom is 36 meters. How many meters is it high?
有一块0.0045公顷的三角形棉田，量得它的底是36米．它的高是多少米？
<gadget id="calculator">0.0045 * 10_000</gadget>
<output>45</output>

<gadget id="calculator">2 / 36</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">45 * (1/18)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>