If a cuboid with a length of 7 decimeters, a width of 6 decimeters and a height of 3 decimeters is cut into two cuboids, what is the maximum surface area in square decimeters?
把长7分米、宽6分米、高3分米的长方体切成两个长方体，表面积最大是多少平方分米．
<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">42 + 21 + 18</gadget>
<output>81</output>

<gadget id="calculator">81 * 2</gadget>
<output>162</output>

<gadget id="calculator">7 * 6 * 2</gadget>
<output>84</output>

<gadget id="calculator">162 + 84</gadget>
<output>246</output>

<result>246</result>