A section of square steel is 3m long and has a square cross section. After sawing it into two equal sections, the surface area increases by 16cm**2 compared to the original one. What is the volume of the original steel dm**3.
一段方钢长3m，横截面是正方形，把它锯成相等的两段后表面积比原来增加了16cm**2，原来钢材的体积是多少dm**3．
<gadget id="calculator">16 / 100</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">(4/25) / 2</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">(2/25) * 30</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>