The shape of a billboard is a parallelogram, its base is 10 meters, and its height is 5 meters. If the billboard is to be decorated with paint, 0.6 kg of paint is used per square meter. How many kg of paint is needed to paint this billboard? ?
某广告牌的形状是平行四边形，它的底是10米，高是5米，如果要用油漆装饰这块广告牌，每平方米用油漆0.6千克，油漆这块广告牌至少需要多少千克的油漆？
<gadget id="calculator">10 * 5 * 0.6</gadget>
<output>30</output>

<result>30</result>