A parallelogram orchard covers an area of 0.42 hectares, with a base length of 84 meters and a height of 84 meters.
一个平行四边行果园占地0.42公顷，底长84米，高多少米．
<gadget id="calculator">0.42 * 10_000</gadget>
<output>4_200</output>

<gadget id="calculator">4_200 / 84</gadget>
<output>50</output>

<result>50</result>