The sum of the three edges of a cuboid intersecting at a point is 45cm, and the ratio of length, width and height is 4:3:2. If this cuboid is cut into two smaller cuboids of the same size, the maximum surface area can be increased by how many square centimeters.
一个长方体相交于一点的三条棱之和为45cm，长宽高的比是4：3：2．把这个长方体截成两个同样大的小长方体，表面积最多可以增加多少平方厘米．
<gadget id="calculator">4 + 3 + 2</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">45 * (4/9)</gadget>
<output>20</output>

<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">45 * (1/3)</gadget>
<output>15</output>

<gadget id="calculator">20 * 15 * 2</gadget>
<output>600</output>

<result>600</result>