The surface area of a cuboid is 30cm**2. After dividing it evenly, it is exactly two equal cubes. What is the surface area of each cube in cm**2?
一个长方体的表面积是30cm**2，把它平均分开后正好是两个相等的正方体，每个正方体的表面积是多少cm**2．
<gadget id="calculator">30 / 10</gadget>
<output>3</output>

<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<result>18</result>