Divide the bottom surface of a cylinder with a height of 3 decimeters into several sectors on average, then cut the cylinder and assemble it into an approximate cuboid with the same base and height. The surface area of the cuboid is 120 square centimeters larger than that of the cylinder. The original cylinder What is the volume of the body?
把一个高3分米的圆柱体底面平均分成若干扇形，然后把圆柱体切开，拼成一个与它等底等高的近似长方体，长方体的表面积比圆柱体的表面积增加120平方厘米，原来圆柱体的体积是多少？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">120 / 2 / 30</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 30</gadget>
<output>376.8</output>

<result>376.8</result>