If a log with a length of 1 meter is cut into two pieces, the surface area increases by 62.8 square centimeters. What is the original volume of the log in cubic centimeters?
把一根长1米的圆木截成两段，表面积增加了62.8平方厘米，这根圆木原来的体积是多少立方厘米．
<gadget id="calculator">62.8 / 2</gadget>
<output>31.4</output>

<gadget id="calculator">31.4 * 1 * 100</gadget>
<output>3_140</output>

<result>3_140</result>