After cutting a cylinder whose base circumference is 12.56 cm into three smaller cylinders of the same size, how many square centimeters will the surface area increase?
把一个底面周长是12.56厘米的圆柱切成同样大的三个小圆柱后，表面积增加了多少平方厘米．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

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

<result>50.24</result>