A rectangular piece of land is 30 meters long and 25 meters wide. If about 40 cabbages are planted per square meter, how many cabbages are planted in this land?
一块长方形的地，长是30米，宽是25米．如果每平方米大约种40棵白菜，这块地约种了多少白菜？
<gadget id="calculator">30 * 25 * 40</gadget>
<output>30_000</output>

<result>30_000</result>