Glue one end of two cylindrical woods of the same thickness and 40 cm in length to form a cylindrical wood. In this way, the surface area is reduced by 9.42 square centimeters compared to the original one. What is the volume in cubic centimeters after gluing?
把粗细一样，长都是40厘米的两个圆柱体木料的一头胶合起来，成为一根圆柱体木料．这样表面积比原来减少9.42平方厘米，问胶合后的体积是多少立方厘米？
<gadget id="calculator">9.42 / 2</gadget>
<output>4.71</output>

<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">4.71 * 80</gadget>
<output>376.8</output>

<result>376.8</result>