Plant radishes in a triangular vegetable field with a base length of 18 meters and a height of 6 meters. If 12 kilograms of radishes are harvested per square meter, how many kilograms of radishes can be harvested in this field?
在一块底边长18米，高6米的三角形菜地里种萝卜．如果每平方米收萝卜12千克，这块地可收萝卜多少千克？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">18 * 3 * 12</gadget>
<output>648</output>

<result>648</result>