A square log 15 decimeters long is sawed into two pieces, and the surface area increases by 24 decimeters square. What is the volume of this square log in cubic decimeters?
把一根长15分米的方木锯成两段，表面积增加了24平方分米，原来这根方木的体积是多少立方分米．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 * 15</gadget>
<output>180</output>

<result>180</result>