There is a large billboard at the entrance of the expressway, with a bottom of 12.5m and a height of 64dm. Uncle Wang wants to decorate this billboard with 0.6 kilograms of paint per square meter. Please help Uncle Wang calculate how many kilograms of paint is needed?
高速公路入口处有一个大型广告牌，底是12.5m，高是64dm．王叔叔要油饰这块广告牌，每平方米有漆0.6千克，请你帮王叔叔算一算需要多少千克油漆？
<gadget id="calculator">64 / 10</gadget>
<output>32/5 = around 6.4</output>

<gadget id="calculator">12.5 * (32/5) * 0.6</gadget>
<output>48</output>

<result>48</result>