A 10 cm long cuboid is cut into 3 sections along the cross section, and the surface area is increased by 12 cm2, what is the volume of the original cuboid in cubic centimeters?
把一个长10厘米的长方体沿横截面切成3段，表面积增加12平方厘米，原来长方体的体积是多少立方厘米．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<result>30</result>