The perimeter of a square field is 800 meters. If 6 tons of rice are harvested per hectare, how many tons of rice can be harvested on this field?
一块正方形地的周长是800米，如果每公顷收稻谷6吨，那么这块地可以收稻谷多少吨？
<gadget id="calculator">800 / 4</gadget>
<output>200</output>

<gadget id="calculator">800 / 4 / 10_000</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">200 * (1/50) * 6</gadget>
<output>24</output>

<result>24</result>