A piece of iron wire can be tied into a cuboid 6 cm long, 5 cm wide, and 4 cm high. If it is used to form a cube, what is the length of the sides of the cube?
一根铁丝可以扎成长6厘米，宽5厘米，高4厘米的长方体．如果用它扎成一个正方体，那么这个正方体的棱长是多少？
<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)</gadget>
<output>5</output>

<result>5</result>