A billboard is 4 meters long, 0.5 meters wide, and 3 meters high. If the outside of the billboard is painted with paint, if 2 kilograms of paint is used per square meter, how many kilograms of paint are needed in total?
一块广告牌长为4米，宽为0.5米，高为3米，把它外面全部涂上油漆，如果每平方米用油漆2千克，共需油漆多少千克？
<gadget id="calculator">4 * 0.5 * 2</gadget>
<output>4</output>

<gadget id="calculator">0.5 * 3 * 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 4 * 2</gadget>
<output>24</output>

<gadget id="calculator">4 + 3 + 24</gadget>
<output>31</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<result>62</result>