If a log is 2 meters long and cut into 3 sections, the surface area increases by 60 square meters, what is the volume of the log?
一根圆木长2米，截成3段，表面积增加60平方米，圆木的体积是多少．
<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">15 * 2 * 10</gadget>
<output>300</output>

<result>300</result>