A parallelogram street billboard has a base of 8.6 meters and a height of 4.5 meters. To paint this billboard, 0.8kg of paint is needed per square meter. How many kilograms of paint do you need to prepare at least?
一块平行四边形街头广告牌，底是8.6米，高是4.5米．要粉刷这块广告牌，每平方米要用油漆0.8kg，至少需要准备多少千克油漆？
<gadget id="calculator">8.6 * 4.5 * 0.8</gadget>
<output>30.96</output>

<result>30.96</result>