A cylindrical wooden block with a base diameter of 10 cm and a height of 8 cm is divided into two halves of the same shape and size along the base diameter. How much does the surface area increase compared to the original?
一个底面直径是10厘米，高8厘米的圆柱形木块，沿底面直径分成形状大小相同的两半，表面积比原来增加多少？
<gadget id="calculator">10 * 8 * 2</gadget>
<output>160</output>

<result>160</result>