The sum of the lengths of the sides of a cuboid and a cube are equal. Given that the length, width and height of the cuboid are 6 decimeters, 4 decimeters and 5 decimeters respectively, find the volume of the cube.
一个长方体和一个正方体的棱长之和相等，已知长方体的长、宽、高分别是6分米、4分米、5分米，求正方体的体积．
<gadget id="calculator">6 + 5 + 4</gadget>
<output>15</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 * (1/3) * 15 * (1/3) * 15 * (1/3)</gadget>
<output>125</output>

<result>125</result>