A rectangular wheat field is 500 meters long and 400 meters wide. If 15 tons of wheat are harvested per hectare, how many tons of wheat can be harvested from this wheat field?
一块长方形的小麦地，长500米，宽400米．如果每公顷收小麦15吨，这块小麦地能收小麦多少吨？
<gadget id="calculator">400 / 10_000</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">15 * 500 * (1/25)</gadget>
<output>300</output>

<result>300</result>