Make a cuboid box out of iron sheets, 0.8 meters long, 0.6 meters wide, and 0.5 meters high. How many square meters of iron sheet is needed to make this box?
用铁皮做一个长方体的箱子，长0.8米，宽0.6米，高0.5米．做这个箱子至少需要铁皮多少平方米？
<gadget id="calculator">0.8 * 0.6</gadget>
<output>0.48</output>

<gadget id="calculator">0.8 * 0.5</gadget>
<output>0.4</output>

<gadget id="calculator">0.6 * 0.5</gadget>
<output>0.3</output>

<gadget id="calculator">0.48 + 0.4 + 0.3</gadget>
<output>1.18</output>

<gadget id="calculator">1.18 * 2</gadget>
<output>2.36</output>

<result>2.36</result>