The ratio of length, width and height of a cuboid is 5:3:2, and the sum of the lengths of all sides is 600cm, what is its surface area in cm**2.
一个长方体的长、宽、高之比是5：3：2，所有棱长的和为600cm，它的表面积是多少cm**2．
<gadget id="calculator">600 / 4</gadget>
<output>150</output>

<gadget id="calculator">5 + 3 + 2</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">150 * (1/2)</gadget>
<output>75</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">150 * (3/10)</gadget>
<output>45</output>

<gadget id="calculator">75 * 45</gadget>
<output>3_375</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">150 * (1/5)</gadget>
<output>30</output>

<gadget id="calculator">75 * 30</gadget>
<output>2_250</output>

<gadget id="calculator">45 * 30</gadget>
<output>1_350</output>

<gadget id="calculator">3_375 + 2_250 + 1_350</gadget>
<output>6_975</output>

<gadget id="calculator">6_975 * 2</gadget>
<output>13_950</output>

<result>13_950</result>