The sum of all lengths, widths, and heights of a cuboid is 400 cm, and the ratio of length, width, and height is 5:3:2. What is the volume of this cuboid in cubic centimeters?
一个长方体的所有长、宽、高之和是400厘米，长、宽、高的比是5：3：2，这个长方体的体积是多少立方厘米．
<gadget id="calculator">400 / 4</gadget>
<output>100</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">100 * (1/2)</gadget>
<output>50</output>

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

<gadget id="calculator">100 * (3/10)</gadget>
<output>30</output>

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

<gadget id="calculator">100 * (1/5)</gadget>
<output>20</output>

<gadget id="calculator">50 * 30 * 20</gadget>
<output>30_000</output>

<result>30_000</result>