If a 2m long cylindrical wood is cut in half along its diameter, the surface area increases by 1.2m2, what is the original volume of this wood in m**3.
把一根长2m的圆柱形森料沿直径对半锯开，表面积增加1.2m2，这根木料原来的体积是多少m**3．
<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 * 2</gadget>
<output>0.1413</output>

<result>0.1413</result>