If a cylindrical block with a base diameter of 4 cm and a height of 5 cm is cut into 3 small cylindrical blocks, the surface area will increase by how many square centimeters compared to the original one.
一个底面直径是4厘米，高5厘米的圆柱形木块，截成3小块圆柱形木块后，表面积比原来增加多少平方厘米．
<gadget id="calculator">4 / 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>