If a log with a base area of 12.56m**2 and a height of 10m is cut into 4 sections, how many meters does the surface area increase**2?
把一根底面积是12.56米**2，高是10米的圆木截成4段，表面积增加了多少米**2．
<gadget id="calculator">12.56 * 6</gadget>
<output>75.36</output>

<result>75.36</result>