A rectangular corn field is 500 meters long and 400 meters wide. If an average of 10 tons of corn is harvested per hectare, how many tons of corn can be harvested in this cornfield?
一块长方形的玉米地，长500米，宽400米．如果每公顷平均收玉米10吨，这块玉米地能收玉米多少吨？
<gadget id="calculator">400 / 10_000</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">10 * 500 * (1/25)</gadget>
<output>200</output>

<result>200</result>