A rectangular street billboard has a length of 15.5m and a width of 8.4m. If the billboard is to be decorated with oil, 0.6kg of paint is used per square meter. How many kilograms of paint are needed?
一块长方形的街头广告牌，长是15.5m，宽是8.4m，如果要油饰这块广告牌，每平方米用油漆0.6kg，需要多少千克油漆？
<gadget id="calculator">15.5 * 8.4 * 0.6</gadget>
<output>78.12</output>

<result>78.12</result>