If the height of a cuboid is reduced by 3 centimeters, it becomes a cube, and the surface area is reduced by 84 square centimeters. What is the volume of the cube in cubic centimeters?
一个长方体的高减少3厘米后，成为一个正方体，那么表面积就减少84平方厘米，这个正方体的体积是多少立方厘米．
<gadget id="calculator">84 / 4 / 3</gadget>
<output>7</output>

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

<result>343</result>