The sum of the lengths of all sides of a cuboid is 84 cm, and the ratio of length, width, and height is 4:2:1. What is the volume of this cuboid in cubic centimeters?
一个长方体所有棱长之和是84厘米，长、宽、高的比是4：2：1，这个长方体的体积是多少立方厘米？
<gadget id="calculator">84 / 4</gadget>
<output>21</output>

<gadget id="calculator">4 + 2 + 1</gadget>
<output>7</output>

<gadget id="calculator">21 / 7</gadget>
<output>3</output>

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

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<gadget id="calculator">12 * 6 * 3</gadget>
<output>216</output>

<result>216</result>