To make a square iron cylinder without a cover, the iron sheet is 240cm**2 in total. If the label paper is pasted around it, what is the minimum area of the label paper in cm**2?
做一个无盖正方体铁筒，共需铁皮240cm**2，如果四周贴上商标纸，求商标纸面积至少要多少cm**2．
<gadget id="calculator">240 / 5</gadget>
<output>48</output>

<gadget id="calculator">48 * 4</gadget>
<output>192</output>

<result>192</result>