A cuboid mailbox made of iron sheet has a length of 6dm, a width of 5dm, and a height of 8dm. How much dm**2 is the iron sheet needed to make this mailbox?
一个用铁皮做成的长方体邮箱，长6dm，宽5dm，高8dm．做这个邮箱至少需要铁皮多少dm**2？
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">6 * 8</gadget>
<output>48</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">30 + 48 + 40</gadget>
<output>118</output>

<gadget id="calculator">118 * 2</gadget>
<output>236</output>

<result>236</result>