A cylindrical piece of wood with a length of 5 meters is sawed into 4 sections, and the surface area is increased by 60 square decimeters. What is the area of the bottom of this wood in square decimeters?
将一根长5米的圆柱形木料锯成4段，表面积增加60平方分米，这根木料的底面积是多少平方分米．
<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<gadget id="calculator">60 / 6</gadget>
<output>10</output>

<result>10</result>