When a 3-meter-long cylindrical log is sawn in two, the surface area increases by 25.12 square decimeters. What was the original lateral area of this piece of wood?
一根长3米的圆柱形木料锯成两段后，表面积增加了25.12平方分米．这根木料原来的侧面积是多少？
<gadget id="calculator">3.14 * 2 * 2 * 3</gadget>
<output>37.68</output>

<result>37.68</result>