A parallelogram vegetable field has a base of 200 meters and a height of 150 meters. How many hectares is this vegetable field?
一块平行四边形的菜地，底是200米，高是150米．这块菜地的面积是多少公顷？
<gadget id="calculator">1 * 10_000</gadget>
<output>10_000</output>

<gadget id="calculator">150 / 10_000</gadget>
<output>3/200 = around 0.015</output>

<gadget id="calculator">200 * (3/200)</gadget>
<output>3</output>

<result>3</result>