A trapezoidal orchard has an upper base of 200 meters, a lower base of 400 meters, and a height of 200 meters. How many hectares does this orchard cover?
一块梯形果园，上底200米，下底400米，高200米．这个果园占地多少公顷？
<gadget id="calculator">200 + 400</gadget>
<output>600</output>

<gadget id="calculator">200 / 2 / 10_000</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">600 * (1/100)</gadget>
<output>6</output>

<result>6</result>