How many square centimeters of iron sheet is needed to make a cube iron box whose edge length is 5 cm.
做一个棱长是5厘米的正方体铁盒，至少需要多少平方厘米的铁皮．
<gadget id="calculator">5 * 5 * 6</gadget>
<output>150</output>

<result>150</result>