The sum of the sides of a cuboid is 400 cm, and the ratio of length to height is 5:3:2. What is the volume of this cuboid in cubic meters?
一个长方体的棱长之和是400厘米，长、高的比是5：3：2，这个长方体的体积是多少立方米．
<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">3 / 10</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(1/5) / 1_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">100 * (1/2) * 100 * (3/10) * 100 * (1/5_000_000)</gadget>
<output>3/100 = around 0.03</output>

<result>3/100 = around 0.03</result>