If a 200 cm long cuboid is sawed into two pieces, the surface area increases by 100 cm2, what is the volume of the log in cubic centimeters?
把一根长200厘米的长方体木料锯成两段后，表面积增加了100平方厘米，这根木料的体积是多少立方厘米．
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 * 200</gadget>
<output>10_000</output>

<result>10_000</result>