A 3m long cylindrical wood is sawed in half along the diameter, and the surface area increases by 1.2m**2, what is the original volume of this wood in cubic meters?
把一根长3m的圆柱形木料沿直径对半锯开，表面积增加1.2m**2，这根木料原来的体积是多少立方米？
<gadget id="calculator">1.2 / 2 / 2</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 / 2</gadget>
<output>0.15</output>

<gadget id="calculator">0.15 ** 2</gadget>
<output>0.0225</output>

<gadget id="calculator">3.14 * 0.0225 * 3</gadget>
<output>0.21195</output>

<result>0.21195</result>