A cuboid is 3 meters long, and its width and height are both 0.4 meters. If it is cut into 3 sections (dividing the length into 3 parts), how many square meters will the surface area increase?
一个长方体长3米，宽和高都是0.4米，把它截成3段(把长平均分成3份)，表面积增加了多少平方米．
<gadget id="calculator">0.4 * 0.4 * 0.4</gadget>
<output>0.064</output>

<result>0.064</result>