There is a cube of wood whose edge length is 4 decimeters. Process this piece of wood into four identical largest cylinders. What is the volume of the remaining part.
有一个正方体的木料，它的棱长是4分米．把这块木料加工成四个一样的最大的圆柱．剩下部分的体积是多少．
<gadget id="calculator">4 * 4 * 4</gadget>
<output>64</output>

<gadget id="calculator">4 / 2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 4 * 4</gadget>
<output>50.24</output>

<gadget id="calculator">64 - 50.24</gadget>
<output>13.76</output>

<result>13.76</result>