If a cone with a base diameter of 27 cm and a height of 9 cm is divided into two blocks of the same shape and size, how many square centimeters will the surface area increase compared to the original one?
一个底面直径是27厘米，高9厘米的圆锥体木块，分成形状大小完全相同的两个木块后，表面积比原来增加多少平方厘米．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">27 * (9/2) * 2</gadget>
<output>243</output>

<result>243</result>