A cylindrical iron rod with a length of 1 meter is sawed into 3 sections (each section is still a cylinder), and the surface area is increased by 0.36 square decimeters. What is the volume of this rod?
把一根长1米的圆柱形铁棒锯成3段(每段仍是圆柱体)，表面积比原来增加了0.36平方分米，这根棒的体积是多少立方分米？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">0.36 / 4</gadget>
<output>0.09</output>

<gadget id="calculator">0.09 * 1 * 10</gadget>
<output>0.9</output>

<result>0.9</result>