Make a cuboid iron sheet water tank with a length of 8 decimeters, a width of 6 decimeters, and a height of 5 decimeters. After deducting the area of the water inlet and the water outlet of 2 square decimeters, how many square decimeters of iron sheet is required to process this water tank (at the joints) can be ignored)
做一个长方体的铁皮水箱，长8分米，宽6分米，高5分米，扣除进水口和出水口处的面积2平方分米，加工这个水箱至少需要多少平方分米的铁皮(接头处忽略不计)
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

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

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

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

<gadget id="calculator">236 - 2</gadget>
<output>234</output>

<result>234</result>