The living room of Naughty House is 8 meters long, 5 meters wide, and 3 meters high. It is planned to paint the walls and roof of the living room. The doors and windows are 12.5 square meters in total. If 0.4 kilograms of paint is used per square meter, how many kilograms of paint are needed?
淘气家客厅长8米、宽5米、高3米，计划对客厅的四壁和屋顶进行粉刷，门窗共计12.5平方米，如果每平方米用涂料0.4千克，至少需要多少千克涂料？
<gadget id="calculator">0.4 * 106.5</gadget>
<output>42.6</output>

<result>42.6</result>