The sum of the sides of a cuboid is 192cm, a:b:h=5:3:4, if only five faces are counted, what is the maximum surface area of the cuboid in cm**2.
一长方体棱长总和192cm，a：b：h=5：3：4，若只计算五个面，这长方体表面积最大是多少cm**2．
<gadget id="calculator">192 / 4</gadget>
<output>48</output>

<gadget id="calculator">5 + 3 + 4</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">48 * (1/4)</gadget>
<output>12</output>

<gadget id="calculator">48 * (5/12) * 12 * 2</gadget>
<output>480</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">48 * (5/12) * 48 * (1/3) * 2</gadget>
<output>640</output>

<gadget id="calculator">12 * 48 * (1/3)</gadget>
<output>192</output>

<gadget id="calculator">480 + 640 + 192</gadget>
<output>1_312</output>

<result>1_312</result>