If a wire with a length of 84 cm is used to form a frame of the largest cube, what is the volume of the cube in cubic centimeters?
用一根长84厘米的铁丝围成一个最大的正方体框架，这个正方体的体积是多少立方厘米？
<gadget id="calculator">84 / 12</gadget>
<output>7</output>

<gadget id="calculator">7 * 7 * 7</gadget>
<output>343</output>

<result>343</result>