A wheat field is 400 meters long and 150 meters wide, with an average harvest of 9 tons of wheat per hectare. How many tons of wheat are harvested in this wheat field?
一块麦地长400米，宽150米，平均每公顷收小麦9吨，这个麦地一共收小麦多少吨？
<gadget id="calculator">150 / 10_000</gadget>
<output>3/200 = around 0.015</output>

<gadget id="calculator">9 * 400 * (3/200)</gadget>
<output>54</output>

<result>54</result>