If a cuboid stick with a length of 1 meter is cut into 3 pieces, and the surface area is increased by 20 square centimeters, what is the volume of the stick in cubic centimeters?
把长1米的长方体木棍截成3段，表面积增加20平方厘米，这根木棍的体积是多少立方厘米．
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

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

<result>500</result>