A cuboid piece of wood is 2.4m long and its cross-section is a square with side length 12cm. Now saw the wood into three sections (the cross-section remains the same), how much will the sum of the surface areas of the three sections increase compared to the original?
一根长方体木料，长2.4m，横截面是一个边长12cm的正方形．现在把这跟木料锯成三段(横截面不变)，这三段木料的表面积之和比原来增加多少？
<gadget id="calculator">12 * 12 * 4</gadget>
<output>576</output>

<result>576</result>