The edge length of a cube oil tank is 12 decimeters, how many square decimeters of iron sheet should be used to make this oil barrel?
一个正方体油箱的棱长是12分米，做这个油桶至少用铁皮多少平方分米？
<gadget id="calculator">12 * 12 * 6</gadget>
<output>864</output>

<result>864</result>