Use three cubes of the same size to form a cuboid. The surface area of this cuboid is 70 square decimeters. What is the surface area of a small cube?
用三个一样大的正方体拼成一个长方体，这个长方体的表面积是70平方分米，求一个小正方体的表面积是多少平方分米？
<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">18 - 4</gadget>
<output>14</output>

<gadget id="calculator">70 / 14</gadget>
<output>5</output>

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>