Saw two cylindrical solid steel bars with the same cross-section and lengths of 12m and 8m respectively into several equal small sections without any residue. If each section is the longest that can be taken, the total surface area of the steel bars will increase compared to the original one. 60cm**2, then what is the volume of the original longer steel bar dm**3.
把横截面一样，长分别是12m和8m的两根圆柱实心钢筋，锯成若干相等的小段而没有剩余，如果锯成了每段又是能取中的最长，那么钢筋的总表面积比原来增加60cm**2，那么原来较长的那根钢筋的体积是多少dm**3．
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>