A cylindrical piece of wood with a length of 1.5 meters, after sawing off a section of 4 decimeters, the surface area is reduced by 50.24 square decimeters, what is the original volume of this wood in cubic decimeters?
一根长1.5米的圆柱形木料，锯掉4分米长的一段后，表面积减少了50.24平方分米，这根木料原来的体积是多少立方分米．
<gadget id="calculator">50.24 / 4 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 1.5 * 10</gadget>
<output>188.4</output>

<result>188.4</result>