A cylindrical iron rod with a length of 1 meter is sawed into 3 sections, and the surface area is increased by 36cm**2 compared with the original one. What is the volume of this iron rod in cm**2?
把1根长1米的圆柱形铁棒锯成3段，表面积比原来增加了36cm**2，这根铁棒体积是多少cm**2．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<gadget id="calculator">9 * 1 * 100</gadget>
<output>900</output>

<result>900</result>