Paint the surface of a cuboid toolbox with a length of 6 decimeters, a width of 5 decimeters, and a height of 4 decimeters. What is the area to be painted in square decimeters?
在一个长6分米、宽5分米、高4分米的长方体工具箱表面涂上油漆，需要涂漆的面积是多少平方分米．
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">30 + 24 + 20</gadget>
<output>74</output>

<gadget id="calculator">74 * 2</gadget>
<output>148</output>

<result>148</result>