Cut a cylinder with a base diameter of 8 cm into several equal parts and assemble it into an approximate cuboid. The surface area of this cuboid is increased by 160cm**2, what is the volume of the cuboid?
把底面直径8cm的圆柱切成若干等分，拼成一个近似的长方体．这个长方体的表面积比原来增加160cm**2，那么长方体的体积是多少．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">160 / 2 / 4</gadget>
<output>20</output>

<gadget id="calculator">3.14 * 16 * 20</gadget>
<output>1_004.8</output>

<result>1_004.8</result>