A billboard is 6 meters long and 2 meters wide. If 2 kilograms of paint is used per square meter, how many kilograms of paint will be used for this billboard?
一块广告牌长6米，宽2米，如果每平方米用油漆2千克，这块广告牌一共要用多少千克油漆？
<gadget id="calculator">6 * 2 * 2</gadget>
<output>24</output>

<result>24</result>