cuboid whose length, width, and height are 7 cm, 6 cm, and 5 cm, respectively, is cut into two cuboids so that the sum of the surface areas of the two cuboids is the largest. What is the sum of the surface areas in square centimeters?
把一个长、宽、高分别是7厘米、6厘米、5厘米的长方体，截成两个长方体，使这两个长方体的表面积之和最大．这时表面积之和是多少平方厘米．
<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">42 + 35 + 30</gadget>
<output>107</output>

<gadget id="calculator">107 * 2</gadget>
<output>214</output>

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

<gadget id="calculator">214 + 84</gadget>
<output>298</output>

<result>298</result>