How much cardboard is needed to make a rectangular box with a length of 6 decimeters, a width of 4 decimeters, and a height of 2 decimeters? (not counting joints)
做一个长是6分米，宽是4分米，高是2分米的长方体硬纸盒，需要多少硬纸板？(接头处不计)
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

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

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">24 + 8 + 12</gadget>
<output>44</output>

<gadget id="calculator">44 * 2</gadget>
<output>88</output>

<result>88</result>