If a cuboid with a length of 20 cm and a width and height of 4 cm is cut into the largest cube, what is the volume of the remaining part?
在一个长是20厘米，宽和高都是4厘米的长方体截上一个最大的正方体，剩下部分的体积是多少？
<gadget id="calculator">20 * 4 * 4</gadget>
<output>320</output>

<gadget id="calculator">4 * 4 * 4</gadget>
<output>64</output>

<gadget id="calculator">320 - 64</gadget>
<output>256</output>

<result>256</result>