The cuboid suitcase is 8dm long, 5dm wide, and 4dm high. How many square decimeters of leather should be used to make such a pair of suitcases?
长方体皮箱长8dm，宽5dm，高4dm，做这样一对皮箱要用多少平方分米的皮革？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

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

<gadget id="calculator">40 + 32 + 20</gadget>
<output>92</output>

<gadget id="calculator">92 * 2 * 2</gadget>
<output>368</output>

<result>368</result>