If a cylindrical steel material with a length of 80 cm and a base radius of 15 cm is sawn into 3 sections, how many square centimeters will the surface area increase?
把一根长80厘米，底面半径是15厘米的圆柱形钢材锯成3段，表面积增加了多少平方厘米？
<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 225 * 4</gadget>
<output>2_826</output>

<result>2_826</result>