parallelogram billboard, the length of the bottom of the billboard is 12.5m, the height is 5.8m shorter than the bottom, paint one side of the billboard, if 0.6kg of paint is used per square meter, paint this billboard at least How many kilograms of paint?
一块平行四边形广告牌，该广告牌的底边长是12.5m，高比底短5.8m，要给广告牌的一面涂油漆，如果每平方米用油漆0.6kg，涂这块广告牌至少要用多少千克油漆？
<gadget id="calculator">12.5 - 5.8</gadget>
<output>6.7</output>

<gadget id="calculator">12.5 * 6.7 * 0.6</gadget>
<output>50.25</output>

<result>50.25</result>