If a cylindrical piece of wood has a base area of 6 square meters, if it is cut into 4 sections, how many square meters will the surface area increase?
一根圆柱形木料，底面积是6平方米，把它截成4段，表面积增加了多少平方米．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>