To make a cube iron cylinder, a total of 240cm**2 of iron sheet is required. If the label paper is pasted around it, what is the minimum area of the label paper in cm**2.
做一个正方体铁筒，共需铁皮240cm**2，如果四周帖上商标纸，商标纸的面积至少要多少cm**2．
<gadget id="calculator">240 / 6</gadget>
<output>40</output>

<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<result>160</result>