If a cuboid block with a length of 9 cm, a width of 8 cm and a height of 7 cm is cut into the largest cube, what is the volume cut off?
把一个长9cm，宽8cm，高7cm的长方体木块削成一个最大的正方体，削去的体积是多少？
<gadget id="calculator">9 * 8 * 7</gadget>
<output>504</output>

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

<gadget id="calculator">504 - 343</gadget>
<output>161</output>

<result>161</result>