There is a vegetable field with a length of 12 meters and a width of 8 meters. If 45 kilograms of vegetables are harvested per square meter, how many kilograms of vegetables can be harvested in this field?
有一块菜地，长12米，宽8米．如果每平方米收菜45千克，这块地可以收菜多少千克？
<gadget id="calculator">12 * 8 * 45</gadget>
<output>4_320</output>

<result>4_320</result>