Paint the surface of a cuboid toolbox with a length of 5 decimeters, a width of 4 decimeters, and a height of 2 decimeters. What is the area to be painted?
将一个长5分米，宽4分米，高2分米的长方体工具箱表面涂上油漆，需要涂油漆的面积是多少平方分米？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">20 + 10 + 8</gadget>
<output>38</output>

<gadget id="calculator">38 * 2</gadget>
<output>76</output>

<result>76</result>