If a cylindrical piece of wood is cut into two pieces, its surface area increases by 6.28m**2; if it is cut into two half cylinders along the diameter, its surface area increases by 40m**2. What is the surface area of this piece of wood?
一根圆柱形木料，如果截成两段，它的表面积增加6.28m**2；如果沿直径剪成两个半圆柱，它的表面积增加40m**2．这段木料的表面积是多少？
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">6.28 / 2 / 6.28 / 2</gadget>
<output>0.25</output>

<gadget id="calculator">0.25 * 0.25 * 2</gadget>
<output>0.125</output>

<gadget id="calculator">40 / 2 / 0.125</gadget>
<output>160</output>

<gadget id="calculator">3.14 * 0.25 * 0.25 * 2 * 160</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 + 6.28</gadget>
<output>69.08</output>

<result>69.08</result>