The sum of the lengths of all sides of a cuboid is 1.8 meters, and the ratio of length, width, and height is 6:5:4. If this cuboid is cut into two smaller cuboids, the maximum surface area can be increased by how many square meters.
一个长方体的所有棱长之和为1.8米，长、宽、高的比是6：5：4．把这个长方体截成两个小长方体，表面积最多可以增加多少平方米．
<gadget id="calculator">1.8 / 4</gadget>
<output>0.45</output>

<gadget id="calculator">6 + 5 + 4</gadget>
<output>15</output>

<gadget id="calculator">6 / 15</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">0.45 * (2/5)</gadget>
<output>0.18</output>

<gadget id="calculator">5 / 15</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">0.45 * (1/3)</gadget>
<output>0.15</output>

<gadget id="calculator">0.18 * 0.15 * 2</gadget>
<output>0.054</output>

<result>0.054</result>