A cube of wood is sawed into two cuboids, the surface area of the small cuboid is 20 cm2 less than that of the large cuboid, and the length of the sides of the original cube is 5 cm, what is the volume of the small cuboid in cubic centimeters?
把一个正方体木块锯成两个长方体，其中小长方体的表面积比大长方体的表面积少20平方厘米，原来正方体木块的棱长是5厘米，问小长方体的体积是多少立方厘米．
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 / 20</gadget>
<output>1</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<result>50</result>