If a log with a length of 1 meter is sawed into 4 equal sections, the surface area is increased by 30 square centimeters compared to the original one, what is the volume of the log in cubic centimeters?
把长1米的圆木锯成相等的4段，表面积比原来增加了30平方厘米，原木料的体积是多少立方厘米．
<gadget id="calculator">30 / 6</gadget>
<output>5</output>

<gadget id="calculator">5 * 1 * 100</gadget>
<output>500</output>

<result>500</result>